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73 | Through this post I am going to explain How Linear Regression works? Let us start with what is regression and how it works? Regression is widely used for prediction and forecasting in field of machine learning. Focus of regression is on the relationship between dependent and one or more independent variables. The “depe... | http://www.tatvic.com/blog/linear-regression-using-r/ | 13 |
67 | Least common multiple
In arithmetic and number theory, the least common multiple (also called the lowest common multiple or smallest common multiple) of two integers a and b, usually denoted by LCM(a, b), is the smallest positive integer that is divisible by both a and b. If either a or b is 0, LCM(a, b) is defined to ... | http://en.wikipedia.org/wiki/Least_common_multiple | 13 |
55 | Geometry is heavily tested on the GRE Math section, and a thorough review of geometrical concepts is essential to a high score. Consider the following problem:
“If the length of an edge of a cube X is twice the length of an edge of cube Y, what is the ratio of the volume of cube Y to the volume of cube X?”
The easiest ... | http://www.newgre.org/preparation/sample-math-problem-hip-square-or-cube/ | 13 |
59 | In the preceding posts, I mentioned infinite products as approximations for π. These may be seen geometrically as exhaustion methods, where the area of a polygon approaches the circular area alternately from above, from below, from above, from below, etc.
There are also integral representations of pi. In such integral ... | http://commonsensequantum.blogspot.com/2010/04/keeping-track-of-circle-for-integral.html | 13 |
707 | |This is the print version of Geometry
You won't see this message or any elements not part of the book's content when you print or preview this page.
Part I- Euclidean Geometry
Chapter 1: Points, Lines, Line Segments and Rays
Points and lines are two of the most fundamental concepts in Geometry, but they are also the m... | http://en.m.wikibooks.org/wiki/Geometry/Print_version | 13 |
50 | The Origin of Asteroidsby Dr. Walt Brown
(This article has been reproduced with permission from the Center for Scientific Creation. The original article can be found here.)
NOTE - In order to fully understand the content of this article (and it’s companion article The Origin of Comets), you should read the book, In the... | http://4thdayalliance.com/articles/solar-system/origin-of-asteroids/ | 13 |
71 | 2.1 The Strength of Gravity and Electric Forces
Gravity is a relatively very weak force. The electric Coulomb force between a proton and an electron is of the order of 1039 (that’s 1 with 39 zeros after it) times stronger than the gravitational force between them.
We can get a hint of the relative strength of electroma... | http://www.thunderbolts.info/wp/2011/10/17/essential-guide-to-the-eu-chapter-2/ | 13 |
158 | An Introduction to MATLAB: Basic Operations
MATLAB is a programming language that is very useful for numerical simulation and data analysis. The following tutorials are intended to give you an introduction to scientific computing in MATLAB.
Lots of MATLAB demos are available online at
You can work through these at your... | http://web.uvic.ca/~monahana/eos225/matlab_tutorial/tutorial_1/introduction_to_matlab.html | 13 |
310 | Area And Perimeter Powerpoint PPT
Therefore, Family A has the pool with the bigger swimming area. The perimeter of Family A’s pool is 12 units long. ... PowerPoint Presentation Author: Dr. Beth McCulloch Vinson Last modified by: Bill Ide Created Date: 7/1/2000 5:08:39 PM
Area and Perimeter By Christine Berg Edited by V... | http://freepdfdb.com/ppt/area-and-perimeter-powerpoint | 13 |
68 | Compounding Functions and Graphing Functions of Functions
- 0:06 Functions
- 0:58 Composite Functions
- 4:01 Domain and Range of Composite…
- 7:06 Lesson Summary
Did You Know…
This lesson is part of a free course that leads to real college credit accepted by 2,900 colleges.
We know that functions map numbers to other n... | http://education-portal.com/academy/lesson/compounding-functions-and-graphing-functions-of-functions.html | 13 |
60 | An ice core is a core sample that is typically removed from an ice sheet, most commonly from the polar ice caps of Antarctica, Greenland or from high mountain glaciers elsewhere. As the ice forms from the incremental build up of annual layers of snow, lower layers are older than upper, and an ice core contains ice form... | http://en.wikipedia.org/wiki/Ice_core | 13 |
55 | Teaching Plan 3
Explore the Circumcenter of a Triangle
This lesson plan is to introduce the concepts of circumcenter by using computers with sketchpad software to explore. Students are able to observe and explore possible results (images) through computers by carrying out their ideas in front of screens.
IL Learning St... | http://mste.illinois.edu/courses/ci499sp01/students/ychen17/project336/teachplan3.html | 13 |
83 | When scientists first began using rockets for research, their eyes were focused upward, on the mysteries that lay beyond our atmosphere and our planet. But it wasn't long before they realized that this new technology could also give them a unique vantage point from which to look back at Earth.
Scientists working with V... | http://history.nasa.gov/SP-4312/ch5.htm | 13 |
50 | 1 Basic Electric Circuits Thevenins and Nortons Theorems Lesson 10 2 THEVENIN NORTON THEVENINS THEOREM Consider the following A
Network 1 Network 2 B
Figure 10.1 Coupled networks. For purposes of discussion at this point we consider that both networks are composed of resis tors and independent voltage and current sourc... | http://www.powershow.com/view/25f58-YTk5Y/Basic_Electric_Circuits_powerpoint_ppt_presentation | 13 |
64 | - How does Radio Echo Sounding Work?
- Frequencies and Wavelengths
- Radio Wave Propagation in Ice
- Field Work
- Data Processing
- Photos and Links
How Does Radio-Echo Sounding Work?
A radio-echo sounding system consists of two main
components: 1) the transmitter, and 2) the receiver. The
transmitter sends out a brief... | http://stolaf.edu/other/cegsic/background/index.htm | 13 |
61 | History of geodesy
Geodesy (/dʒiːˈɒdɨsi/), also named geodetics, is the scientific discipline that deals with the measurement and representation of the Earth.
Humanity has always been interested in the Earth. During very early times this interest was limited, naturally, to the immediate vicinity of home and residency, ... | http://en.wikipedia.org/wiki/History_of_geodesy | 13 |
50 | Deforestation is the logging or burning of trees in forested areas. There are several reasons for doing so: trees or derived charcoal can be sold as a commodity and are used by humans while cleared land is used as pasture, plantations of commodities and human settlement. The removal of trees without sufficient reforest... | http://everything.explained.at/Deforestation/ | 13 |
62 | Over the years, NASA has collected a great deal of Earth science data from dozens of orbiting satellites. With time, these data collections have scattered among many archives that vary significantly in sophistication and access. NASA risked losing valuable, irreplaceable data as people retired, storage media decayed, f... | http://asis.org/Bulletin/Apr-95/schaefer.html | 13 |
80 | Feathered dinosaurs is a term used to describe dinosaurs, particularly maniraptoran dromaeosaurs, that were covered in plumage; either filament-like intergumentary structures with few branches, to fully developed pennaceous feathers complete with shafts and vanes. Feathered dinosaurs first came to realization after it ... | http://fossil.wikia.com/wiki/Feathered_dinosaurs | 13 |
104 | B1. Motion on prescribed trajectory
Inclined plane. Motion on an inclined plane. The inclined plane as a machine
When a mass is being raised, the direction of the motion (vertically upwards) and the direction of the load (weight, vertically downwards) are opposite, they form a stretched angle, a special one of all angl... | http://mpec.sc.mahidol.ac.th/radok/physmath/PHYSICS/B1.htm | 13 |
89 | In many data analyses in social science, it is desirable to compute a coefficient of association. Coefficients of association are quantitative measures of the amount of relationship between two variables. Ultimately, most techniques can be reduced to a coefficient of association and expressed as the amount of relations... | http://jamesstacks.com/stat/pearson.htm | 13 |
100 | Movement advocating the immediate end of slavery. The abolitionist movement began in earnest in the United States in the 1820s and expanded under the influence of the Second Great Awakening, a Christian religious movement that emphasized the equality of all men and women in the eyes of God. Most leading abolitionists l... | http://www.civilwarinart.org/glossary | 13 |
67 | A screw thread, often shortened to thread, is a helical structure used to convert between rotational and linear movement or force. A screw thread is a ridge wrapped around a cylinder or cone in the form of a helix, with the former being called a straight thread and the latter called a tapered thread. A screw thread is ... | http://en.wikipedia.org/wiki/Screw_thread | 13 |
79 | From earliest times, astronomers assumed that the orbits in which the planets moved were circular; yet the numerous catalogs of measurements compiled especially during the 16th cent. did not fit this theory. At the beginning of the 17th cent., Johannes Kepler stated three laws of planetary motion that explained the obs... | http://www.reference.com/browse/Orbit | 13 |
114 | Elementary Human Genetics
The Central Asian Gene Pool
The Karakalpak Gene Pool
Discussion and Conclusions
Elementary Human Genetics
Every human is defined by his or her library of genetic material, copies of which are stored in every cell of the
body apart from the red blood cells. Cells are classified as somatic, mean... | http://www.karakalpak.com/genetics.html | 13 |
77 | A map projection is a systematic transformation of the latitudes and longitudes of locations on the surface of a sphere or an ellipsoid into locations on a plane. Map projections are necessary for creating maps. All map projections distort the surface in some fashion. Depending on the purpose of the map, some distortio... | http://en.wikipedia.org/wiki/Map_projection | 13 |
123 | Some Common Alternative Conceptions (Misconceptions)
Earth Systems, Cosmology and Astronomy
The correct conception of seasonal change is that it is caused by the tilting of the earth relative to the sun’s rays. As the Earth goes around its orbit, the Northern hemisphere is at various times oriented more toward or more ... | http://www.apa.org/education/k12/alternative-conceptions.aspx | 13 |
83 | Science Fair Project Encyclopedia
This article is about angles in geometry. For other articles, see Angle (disambiguation)
An angle (from the Lat. angulus, a corner, a diminutive, of which the primitive form, angus, does not occur in Latin; cognate are the Lat. angere, to compress into a bend or to strangle, and the Gr... | http://www.all-science-fair-projects.com/science_fair_projects_encyclopedia/Angle | 13 |
61 | In 1929, Edwin Hubble discovered that the universe was expanding, and the velocity of expansion was a function of the distance from the Earth. For example, galaxies at a “proper distance” D from the Earth were moving away from the Earth at a velocity v, according to the following equation: v = H0D, where H0 is the cons... | http://www.louisdelmonte.com/unraveling-the-universes-accelerated-expansion/ | 13 |
54 | Circumference Of a Circle When Radius is Given Video Tutorial
circles video, circumference video, curves video, plane figures video, radius video, shapes video.
Watch Our Video Tutorials At Full Length
At TuLyn, we have over 2000 math video clips. While our guests can view a short preview of each video clip, our member... | http://tulyn.com/4th-grade-math/radius/videotutorials/circumference-of-a-circle-when-radius-is-given_by_polly.html | 13 |
57 | Using Critical Points
The second sort of critical point is an inflection point. This is a point in the graph where on one side, the slop is increasing, and on the other side, the slope is decreasing. This can happen whether the curve is increasing or decreasing. Look in the following graph at the first inflection point... | http://www.qcalculus.com/cal06.htm | 13 |
91 | Invasion of Burma
Contributor: C. Peter Chen
Burma, isolated from the rest of the world with mountainous ranges on her western, northern, and eastern borders, was a British colony with a degree of autonomy. With the pressure from Japan, British armed Burma with some British and Indian troops and obsolete aircraft so th... | http://ww2db.com/battle_spec.php?battle_id=59 | 13 |
58 | Language Arts Lessons
Useful Word Lists
Help and Information
- British Spelling
- Custom Sentences and Definitions
- Funding Sources
- FAQs - Frequently Asked Questions
- Getting Started Welcome Letters
- Handwriting Worksheets
- Our Educational Awards
- Single Sign On via Gmail
- Sequential Spelling Program
- Student ... | http://www.spellingcity.com/fourth-grade-math-vocabulary.html | 13 |
58 | Section 17: Geography¶
It is very common to have data in which the coordinate are “geographics” or “latitude/longitude”.
Unlike coordinates in Mercator, UTM, or Stateplane, geographic coordinates are not cartesian coordinates. Geographic coordinates do not represent a linear distance from an origin as plotted on a plan... | http://workshops.opengeo.org/postgis-intro/geography.html | 13 |
129 | Non-Programmer's Tutorial for Python 3/Defining Functions
To start off this chapter I am going to give you an example of what you could do but shouldn't (so don't type it in):
a = 23 b = -23 if a < 0: a = -a if b < 0: b = -b if a == b: print("The absolute values of", a, "and", b, "are equal") else: print("The absolute ... | http://en.m.wikibooks.org/wiki/Non-Programmer's_Tutorial_for_Python_3/Defining_Functions | 13 |
227 | Analysis of variance
Analysis of variance (ANOVA) is a collection of statistical models used to analyze the differences between group means and their associated procedures (such as "variation" among and between groups). In ANOVA setting, the observed variance in a particular variable is partitioned into components attr... | http://en.wikipedia.org/wiki/Analysis_of_variance | 13 |
77 | Fusion power refers to power generated by nuclear fusion reactions. In Physics and Nuclear chemistry, nuclear fusion is the process by which multiple- like charged atomic nuclei join together to form a heavier nucleus In this kind of reaction, two light atomic nuclei fuse together to form a heavier nucleus and in doing... | http://citizendia.org/Fusion_power | 13 |
72 | Exploring Learning Styles and Instruction
Learning is an interactive process, the product of student and teacher activity
within a specific learning environment. These activities, which are the
central elements of the learning process, show a wide variation in pattern,
style and quality (Keefe, 1987). Learning problems... | http://jwilson.coe.uga.edu/EMT705/EMT705.Hood.html | 13 |
56 | Electricity: Static Electricity
Static Electricity: Problem Set Overview
This set of 33 problems targets your ability to determine circuit quantities such as the quantity of charge, separation distance between charges, electric force, electric field strength, and resultant forces and field strengths from verbal descrip... | http://www.physicsclassroom.com/calcpad/estatics/index.cfm | 13 |
66 | Quadrilateral Overview Basics of quadrilaterals including concave, convex ones. Parallelograms, rectangles, rhombi and squares
⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtitles.
- What I wanna do in this... | http://www.khanacademy.org/math/geometry/quadrilaterals-and-polygons/v/quadrilateral-overview | 13 |
102 | Basic Radar Systems
Principle of Operation
Radar is an acronym
for Radio Detection and Ranging. The term "radio"
refers to the use of electromagnetic waves with wavelengths in the so-called radio
wave portion of the spectrum, which covers a wide range from 104 km to 1 cm. Radar
systems typically use wavelengths on the ... | http://www.fas.org/man/dod-101/navy/docs/es310/radarsys/radarsys.htm | 13 |
167 | Transcript: OK, so anyway, let's get started. So, the first unit of the class, so basically I'm going to go over the first half of the class today, and the second half of the class on Tuesday just because we have to start somewhere. So, the first things that we learned about in this class were vectors, and how to do do... | http://xoax.net/math/crs/multivariable_calculus_mit/lessons/Lecture34/ | 13 |
67 | Solar sails (also called light sails or photon sails, especially when they use light sources other than the Sun) are a proposed form of spacecraft propulsion using large membrane mirrors. Radiation pressure is about 10-5 Pa at Earth's distance from the Sun and decreases by the square of the distance from the light sour... | http://www.reference.com/browse/Keplerian+orbit | 13 |
51 | This chapter describes how to calculate the radiation fields. It also provides general information about the antenna characteristics that can be derived based on the radiation fields.
Once the currents on the circuit are known, the electromagnetic fields can be computed. They can be expressed in the spherical coordinat... | http://cp.literature.agilent.com/litweb/pdf/ads2008/emds/ads2008/Radiation_Patterns_and_Antenna_Characteristics.html | 13 |
255 | Quantitative Introduction to General Relativity
For a general overview of the theory, see General Relativity
|This article/section deals with mathematical concepts appropriate for a student in late university or graduate level.|
General Relativity is a mathematical extension of Special Relativity. GR views space-time a... | http://www.conservapedia.com/Quantitative_Introduction_to_General_Relativity | 13 |
75 | California Mathematics Standards, 6th Grade
1.0 Students compare and order positive and negative fractions, decimals, and mixed numbers. Students solve problems involving fractions, ratios, proportions, and percentages:
1.1 Compare and order positive and negative fractions, decimals, mixed numbers and place them on a n... | http://mathforum.org/alejandre/frisbie/math/standards6.html | 13 |
166 | Gravity is the force of attraction between massive particles. Weight is determined by the mass of an object and its location in a gravitational field. While a great deal is known about the properties of gravity, the ultimate cause of the gravitational force remains an open question. General relativity is the most succe... | http://www.exampleproblems.com/wiki/index.php?title=Gravity&oldid=31142 | 13 |
70 | The bold plan for an Apollo mission based on LOR held the promise of landing on the moon by 1969, but it presented many daunting technical difficulties. Before NASA could dare attempt any type of lunar landing, it had to learn a great deal more about the destination. Although no one believed that the moon was made of g... | http://history.nasa.gov/SP-4308/ch10.htm | 13 |
76 | Definite integral from a to b is the area contained between f(x) and the x-axis on that interval.
Area between two curves is found by 1) determining where the 2 functions intersect 2) determining which function is the greater function over that interval and 3) evaluating the definite integral over the interval of great... | http://www.powershow.com/view/e2280-YmIwO/Applications_of_the_Integral_powerpoint_ppt_presentation | 13 |
50 | The original Super Sun, prior to its nova, was accumulating electrons from the Galaxy consistent with the demands of the environment through which it was passing. As we have explained earlier, the Super Sun became too electro-negative and expelled material violently into its surrounding space. This material could not e... | http://www.grazian-archive.com/quantavolution/QuantaHTML/vol_05/solaria-binaria_05.htm | 13 |
55 | Okay, so now that you have the basic idea of what a limit is, we’re going to develop your intuition a little.
Section 2.2: The Limit of a Function
This whole chapter is to show you two things: 1) How a limit works on a function in general, 2) how to deal with limits in practice.
So, let’s start off with the book’s defi... | http://www.theweinerworks.com/?p=675 | 13 |
100 | Conversion Factors and Functions
Earlier we showed how unity factors can be used to express quantities in different units of the same parameter. For example, a density can be expressed in g/cm3 or lb/ft3. Now we will see how conversion factors representing mathematical functions, like D = m/v, can be used to transform ... | http://chempaths.chemeddl.org/services/chempaths/?q=book/General%20Chemistry%20Textbook/Introduction%3A%20The%20Ambit%20of%20Chemistry/1183/conversion-factors-and-fun | 13 |
87 | Mathematics Grade 4
|Printable Version (pdf)|
(1) Students generalize their understanding of place value to 1,000,000, understanding the relative sizes of numbers in each place. They apply their understanding of models for multiplication (equal-sized groups, arrays, area models), place value, and properties of operati... | http://www.uen.org/core/core.do?courseNum=5140 | 13 |
53 | |, � & Radiation||Alpha Decay||Beta Decay|
|Gamma Decay||Spontaneous Fission||Neutron-Rich Versus Neutron-Poor Nuclides|
|Binding Energy Calculations||The Kinetics of Radioactive Decay||Dating By Radioactive Decay|
Early studies of radioactivity indicated that three different kinds of radiation were emitted, symbolized... | http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch23/modes.php | 13 |
60 | Uniform motion is motion at a constant speed in a straight line. Uniform motion can be described by a few simple equations. The distance s covered by a body moving with velocity v during a time t is given by s=vt. If the velocity is changing, either in direction or magnitude, it is called accelerated motion (see accele... | http://www.reference.com/browse/columbia/motion | 13 |
67 | You can use formulas and functions in lists or libraries to calculate data in a variety of ways. By adding a calculated column to a list or library, you can create a formula that includes data from other columns and performs functions to calculate dates and times, to perform mathematical equations, or to manipulate tex... | http://office.microsoft.com/en-us/windows-sharepoint-services-help/introduction-to-data-calculations-HA010121588.aspx | 13 |
58 | The determinant of a matrix (written |A|) is a single number that depends on the elements of the matrix A. Determinants exist only for square matrices (i.e., ones where the number of rows equals the number of columns).
Determinants are a basic building block of linear algebra, and are useful for finding areas and volum... | http://www.conservapedia.com/Determinant | 13 |
56 | If you have progressed through the tutorial this far, you are now ready to program in 3D. However, 3D programming is not like modeling clay, where you simply move the clay with your hands and everything looks perfect.
3D programming is strictly mathematical, and you must understand the concepts of 3D mathematics before... | http://www.directxtutorial.com/Lesson.aspx?lessonid=9-4-3 | 13 |
58 | Unlike range and quartiles, the variance combines all the values in a data set to produce a measure of spread. The variance (symbolized by S2) and standard deviation (the square root of the variance, symbolized by S) are the most commonly used measures of spread.
We know that variance is a measure of how spread out a d... | http://www.statcan.gc.ca/edu/power-pouvoir/ch12/5214891-eng.htm | 13 |
206 | Transcript: So, basically the last few weeks, we've been doing derivatives. Now, we're going to integrals. So -- OK, so more precisely, we are going to be talking about double integrals. OK, so just to motivate the notion, let me just remind you that when you have a function of one variable -- -- say, f of x, and you t... | http://xoax.net/math/crs/multivariable_calculus_mit/lessons/Lecture16/ | 13 |
60 | An n dimensional pyramid or cone is a geometric figure consisting of an (n-1) dimensional base and a vertical axis such that the cross-section of the figure at any height y is a scaled down version of the base. The cross-section becomes zero at some height H. The point at which the cross-section is zero is called the v... | http://www.sjsu.edu/faculty/watkins/npyramid.htm | 13 |
58 | Basic Algebra/Working with Numbers/Distributive Property
Sum The resulting quantity obtained by the addition of two or more terms.
Real Number: An element of the set of all rational and irrational numbers. All of these numbers can be expressed as decimals.
Monomial: An algebraic expression consisting of one term.
Binom... | http://en.wikibooks.org/wiki/Basic_Algebra/Working_with_Numbers/Distributive_Property | 13 |
51 | Origin and Evolutionary Relationships of Giant Galápagos Tortoises
Andalgisa Caccone, James P. Gibbs, Valerio Ketmaier, Elizabeth Suatoni, and Jeffrey R. Powell. Proc Natl Acad Sci, USA, 1999 November 9; 96(23)13223-13228
Giant tortoises, up to 5 feet in length, were widespread on all continents except Australia and An... | http://www.anapsid.org/chaco4.html | 13 |
92 | - This page is about the measurement using water as a reference. For a general use of specific gravity, see relative density. See intensive property for the property implied by specific.
Specific gravity is the ratio of the density of a substance compared to the density (mass of the same unit volume) of a reference sub... | http://en.wikipedia.org/wiki/Specific_gravity | 13 |
61 | In mathematics, a group is an algebraic structure consisting of a set together with an operation that combines any two of its elements to form a third element. To qualify as a group, the set and the operation must satisfy a few conditions called group axioms, namely associativity, identity and invertibility. While thes... | http://everything.explained.at/Group_(mathematics)/ | 13 |
55 | Send a Note to Zig |
Table of content
Chapter 9 : Analysis of Trusses
- 9.1 Definition of trusses
- 9.2 Properties of 2-force members
- 9.3 Method of Joints
- 9.4 Method of Sections
- 9.5 Compound Trusses
- 9.6 Trusses in 3-D
- 9.7 Summary
- 9.8 Self-Test and computer Program TRUSS
Trusses are structures consisting o... | http://mac6.ma.psu.edu/em211/p09a.html | 13 |
72 | A Basic Introduction to the Science Underlying
WHAT IS A GENOME?
Life is specified by genomes. Every organism, including
humans, has a genome that contains all of the biological information
needed to build and maintain a living example of that organism.
The biological information contained in a genome is encoded in its... | http://www.ncbi.nlm.nih.gov/About/primer/genetics_genome.html | 13 |
55 | Proof of the area of a trapezoid
A first good way to start off with the proof of the area of a trapezoid is to draw a trapezoid and turn the trapezoid into a rectangle.
Look at the trapezoid ABCD above. How would you turn this into a rectangle?
Draw the average base (shown in red) which connects the midpoint of the two... | http://www.basic-mathematics.com/proof-of-the-area-of-a-trapezoid.html | 13 |
124 | |Schematic diagram of a high-bypass turbofan engine|
|Part of a series on
A turbofan is a type of aircraft gas turbine engine that provides thrust using a combination of a ducted fan and a jet exhaust nozzle. Part of the airstream from the ducted fan passes through the core, providing oxygen to burn fuel to create pow... | http://www.thefullwiki.org/Turbofan | 13 |
58 | Introduction to Tension An introduction to tension. Solving for the tension(s) in a set of wires when a weight is hanging from them.
Introduction to Tension
⇐ Use this menu to view and help create subtitles for this video in many different languages. You'll probably want to hide YouTube's captions if using these subtit... | http://www.khanacademy.org/science/physics/forces-newtons-laws/tension-tutorial/v/introduction-to-tension | 13 |
52 | Length, width, height, depth
- People often ask about the "correct" use of length, width, height, and depth.
- In the most common contexts in elementary school, mathematics does not have a formal definition for these terms, nor does it have rules about "proper" use. But natural usage does follow some conventions. (See ... | http://thinkmath.edc.org/index.php/Length,_width,_height,_depth | 13 |
167 | Ratio And Proportion Activities DOC
Proportion Activity (One Foot Tale) Class: Algebra I. Summary: In this lesson, students apply proportions to examine real life questions. ... Write a ratio using your height in inches: 12” : _____ (actual height)
A ratio is a comparison of two quantities that tells the scale between ... | http://freepdfdb.com/doc/ratio-and-proportion-activities | 13 |
235 | An angle is acute if it is less than 90.
A triangle with three internal angles, each less than 90°, is called an acute-angled triangle.
The amplitude of a wave is half the vertical distance from a crest to a trough.
An angle is a measure of turning. Angles are measured in degrees. The symbol for an angle is .
Under a r... | http://www.absorblearning.com/mathematics/glossary.html | 13 |
57 | To receive more information about up-to-date research on micronutrients, sign up for the free, semi-annual LPI Research Newsletter here.
The immune system protects the body against infection and disease. It is a complex and integrated system of cells, tissues, and organs that have specialized roles in defending against... | http://lpi.oregonstate.edu/infocenter/immunity.html | 13 |
81 | Glossary of Motor and Motion Related Terms
This motor terminology glossary is guide to explain and define a variety of terms and characteristics that apply to AC and DC electric motors and motion control related terms.
AC (Alternating Current) - The commonly available electric power supplied by an AC generator and is d... | http://www.sdtdrivetechnology.co.uk/glossary-of-related-terms/ | 13 |
86 | Visualization of the quicksort algorithm. The horizontal lines are pivot values.
|Worst case performance||O(n2)|
|Best case performance||O(n log n)|
|Average case performance||O(n log n)|
|Worst case space complexity||O(n) auxiliary (naive)
O(log n) auxiliary (Sedgewick 1978)
Quicksort, or partition-exchange sort, is a... | http://en.wikipedia.org/wiki/Quicksort | 13 |
71 | A magnetic field will exert a force on a single moving charge, so it follows that it will also exert a force on a current, which is a collection of moving charges.
The force experienced by a wire of length l carrying a current I in a magnetic field B is given by
Again, the right-hand rule can be used to find the direct... | http://physics.bu.edu/~duffy/PY106/MagForce.html | 13 |
51 | There are three basic ways in which heat is transferred. In fluids, heat is often transferred by convection, in which the motion of the fluid itself carries heat from one place to another. Another way to transfer heat is by conduction, which does not involve any motion of a substance, but rather is a transfer of energy... | http://physics.bu.edu/~duffy/py105/notes/Heattransfer.html | 13 |
124 | A cache is a small amount of memory which operates more quickly than main memory. Data is moved from the main memory to the cache, so that it can be accessed faster. Modern chip designers put several caches on the same die as the processor; designers often allocate more die area to caches than the CPU itself. Increasin... | http://en.wikibooks.org/wiki/Microprocessor_Design/Cache | 13 |
80 | 1 These tables present experimental statistics showing the Gross Value of Irrigated Agricultural Production (GVIAP). Annual data are presented for the reference periods from 2000–01 to 2008–09 for Australia, States and Territories, for the Murray-Darling Basin for selected years (2000–01, 2005–06, 2006–07, 2007–08 and ... | http://www.abs.gov.au/AUSSTATS/abs@.nsf/Lookup/4610.0.55.008Explanatory%20Notes12000%E2%80%9301%20-%202008%E2%80%9309?OpenDocument | 13 |
278 | (2002-06-23) The Basics:
| f ' =
What is a derivative?
Well, let me give you the traditional approach first.
This will be complemented by an abstract glimpse of the bigger picture,
which is more closely related to the way people actually use
derivatives, once they are familiar with them.
For a given real-valued functio... | http://www.numericana.com/answer/calculus.htm | 13 |
59 | |Part of a series on|
An earthquake (also known as a quake, tremor or temblor) is the result of a sudden release of energy in the Earth's crust that creates seismic waves. The seismicity, seismism or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.
Ear... | http://en.wikipedia.org/wiki/Earthquakes | 13 |
91 | A value is one of the fundamental things — like a letter or a number — that a program manipulates. The values we have seen so far are 4 (the result when we added 2 + 2), and "Hello, World!".
These values are classified into different classes, or data types: 4 is an integer, and "Hello, World!" is a string, so-called be... | http://www.openbookproject.net/thinkcs/python/english3e/variables_expressions_statements.html | 13 |
139 | ||This article needs additional citations for verification. (April 2012)|
Multiplication (often denoted by the cross symbol "×") is the mathematical operation of scaling one number by another. It is one of the four basic operations in elementary arithmetic (the others being addition, subtraction and division).
Because ... | http://en.wikipedia.org/wiki/Multiplication | 13 |
89 | A triangle is a type of polygon having three sides and, therefore, three angles. The triangle is a closed figure formed from three straight line segments joined at their ends. The points at the ends can be called the corners, angles, or vertices of the triangle. Since any given triangle lies completely within a plane, ... | http://en.wikibooks.org/wiki/Geometry/Triangle | 13 |
62 | Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |
A statistical hypothesis test is a method of making statistical decisions from and about experimental data. Null-hypothesis testing just answers the question of "how well the findings fit the possibility that chance fac... | http://psychology.wikia.com/wiki/Statistical_test | 13 |
87 | Using Living Math Materials and Plans with Structured, Incremental or Various Other Math Teaching Approaches
Note: This article was written for families using the Living Math Lesson plans in response to questions by families wanting to integrate the material with their math approach. Most of the comments, however, are ... | http://www.livingmath.net/LessonPlans/UsingLivingMathArticle/tabid/1026/language/en-US/Default.aspx | 13 |
59 | An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum to directly view a magnified image for making a photograph, or collecting data through electronic image sensors.
There are three primary types of optical telescope: refractors which u... | http://en.wikipedia.org/wiki/Optical_telescope | 13 |
75 | APEC/CANR, University of Delaware
In 1763-67 Charles Mason and Jeremiah Dixon surveyed and marked most of the boundaries between Maryland, Pennsylvania and the Three Lower Counties that became Delaware. The survey, commissioned by the Penn and Calvert families to settle their long-running boundary dispute, provides an ... | http://www.udel.edu/johnmack/mason_dixon/ | 13 |
78 | Suppose that we are asked to find the area enclosed by a circle of given radius. A simple way to go about this is to draw such a circle on graph paper and count the number of small squares within it. Then
area contained ≈ number of small squares within circle × area of a small square.
A circle drawn on graph paper - th... | http://plus.maths.org/content/os/issue43/features/korner/index | 13 |
64 | The Delivery System
Our first objective is to describe why the orbits of Neptune and Uranus came to be located 1.8 and 2.8 billion miles from the Sun. These distances are 19.2 and 30.1 a.u. from the Sun. Some groundwork must be laid.
Earlier, evidence was presented in the form of twin spins that both planets co-orbited... | http://www.creationism.org/patten/PattenRecOrgSolSys/PattenRootssCh06.html | 13 |
105 | To receive more information about up-to-date research on micronutrients, sign up for the free, semi-annual LPI Research Newsletter here.
Structure and Physiology
Bone Composition and Structure. Our skeleton may seem an inert structure, but it is an active organ, made up of tissue and cells in a continual state of activ... | http://lpi.oregonstate.edu/infocenter/bonehealth.html | 13 |
97 | Heat transfer coefficient
The heat transfer coefficient, in thermodynamics and in mechanical and chemical engineering, is used in calculating the heat transfer, typically by convection or phase transition between a fluid and a solid:
- Q = heat flow in input or lost heat flow , J/s = W
- h = heat transfer coefficient, ... | http://en.wikipedia.org/wiki/Heat_transfer_coefficient | 13 |
58 | Measurements of AC magnitude
So far we know that AC voltage alternates in polarity and AC current alternates in direction. We also know that AC can alternate in a variety of different ways, and by tracing the alternation over time we can plot it as a “waveform.” We can measure the rate of alternation by measuring the t... | http://www.allaboutcircuits.com/vol_2/chpt_1/3.html | 13 |
220 | In this chapter fluids at rest will be studied. Mass density, weight density, pressure, fluid pressure, buoyancy, and Pascal's principle will be discussed. In the following, the symbol ( ρ ) is pronounced " rho ."
Example 1 : The mass density of steel is 7.8 gr /cm3. A chunk of steel has a volume of 141cm3. Determine (... | http://www.pstcc.edu/departments/natural_behavioral_sciences/Web%20Physics/Chapter11.htm | 13 |
110 | From Math Images
- An involute of a circle can be obtained by rolling a line around the circle in a special way.
Basic DescriptionImagine you have a string attached to a point on a fixed curve. Then, tautly wind the string onto the curve. The trace of the end point on the string gives an involute of the original curve,... | http://mathforum.org/mathimages/index.php/Involute | 13 |
58 | What is a parametric curve?
A parametric curve in the plane is a pair of functions
where the two continuous functions define ordered pairs (x,y). These two equations are usually called the parametric equations of a curve. The extent of the curve will depend on the range of t. We wil pay close attention to the range of ... | http://jwilson.coe.uga.edu/EMT668/EMAT6680.2003.Su/Fagler/AssignmentsBF/Assignment10BF/Assignment10BF.html | 13 |
52 | 11. Investigating the shapes of graphs
It is a useful skill to be able to draw an accurate (representative) sketch graph of a function of a variable. It can aid in the understanding of a topic, and moreover, it can aid those who might find the mental envisaging of some of the more complex functions very difficult.
Ofte... | http://www.thestudentroom.co.uk/wiki/Revision:OCR_Core_1_-_Investigating_the_shapes_of_graphs | 13 |
152 | These video lectures of Professor Gilbert Strang teaching 18.06 were recorded in Fall 1999 and do not correspond precisely to the current edition of the textbook. However, this book is still the best reference for more information on the topics covered in each lecture.
Instructor/speaker: Prof. Gilbert Strang
I've been... | http://ocw.mit.edu/courses/mathematics/18-06-linear-algebra-spring-2010/video-lectures/lecture-3-multiplication-and-inverse-matrices/ | 13 |
56 | Mechanics: Work, Energy and Power
Work, Energy and Power: Problem Set Overview
This set of 32 problems targets your ability to use equations related to work and power, to calculate the kinetic, potential and total mechanical energy, and to use the work-energy relationship in order to determine the final speed, stopping... | http://www.physicsclassroom.com/calcpad/energy/index.cfm | 13 |
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