question stringlengths 1 296 | answers listlengths 1 279 | ctxs listlengths 30 30 |
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How did the British empire get so big and powerful ? | [
"The UK is by no means a small country. Back in the days they were even bigger, relatively speaking. Since they lived on an island, they weren't involved in that many invasions(compared to continental Europe). \n\nMost of the wars England engaged in were sea combat. Their naval technology was therefor outstanding a... | [
"of British Empire The British built up a very large worldwide British Empire, which peaked in size in 1922. The cumulative costs of fighting two world wars, however, placed a heavy burden upon the UK economy, and after 1945 the British Empire gradually began to disintegrate, with many territories demanding indepen... |
Why does driving at 70 km/hr on a quiet road feel like speeding, but feels like travelling at a snail's pace on a freeway? | [
"I believe it is simply because the suburban street is narrower and you are passing by stationary objects like parked cars and trees much closer than you would on a freeway.",
"It's to do with having less reference points to calculate your speed. \n\nFun fact: what caused Howard Hughes to delay shooting his movie... | [
"of the road when there is a large vehicle or semi-truck approaching for two reasons: to avoid the blast of air that accompanies large vehicles traveling at speed; because most people feel uncomfortable within close proximity to a large vehicle and will attempt to create distance by backing from the roadway as the ... |
Why do we remember certain memories from a third person view? | [
"Memories aren't real things. You recreate and change them each time you recall something. So you can put yourself outside yourself if it helps you deal with the memory or understand it. It's not what you actually experienced, but it wouldn't be what you actually experienced in the 1st person either."
] | [
"aspects of a scene or event are missing from memory, people may incorrectly remember having actually seen or experienced them because they are usually a regular aspect of the schema. For example, an individual may not remember paying the waiter, but may believe they have done so, as this is a regular step in the s... |
How does gas get " trapped" in your abdomen? | [
"Like, in your GI tract? It generally gets there by you swallowing air or the bacteria in your gut releasing gas through breaking down your food."
] | [
"to store gas in the superior arched portion, enabling the colon to expel gas without excreting faeces simultaneously. Coverings It is completely surrounded by peritoneum (and thus is not retroperitoneal), which forms a mesentery (sigmoid mesocolon), which diminishes in length from the center toward the ends of the... |
What causes the different atmospheric pressures in our atmosphere? | [
"Uneven heating/cooling of water mostly.\n\nIf the sun heats one portion of ocean a bit more than another, the air above it also warms up. That creates higher pressure directly over that water.",
"As stated, it's mainly caused by the uneven heating of the earth. Water takes much more energy to heat up than land a... | [
"Atmosphere Pressure Atmospheric pressure at a particular location is the force per unit area perpendicular to a surface determined by the weight of the vertical column of atmosphere above that location. On Earth, units of air pressure are based on the internationally recognized standard atmosphere (atm), which is ... |
Why do I sleep less when I go to sleep drunk, and why do I have so much energy the whole next day? | [
"Since alcohol is a depressant your body is biologically fighting that, essentially trying to bring you back \"up\" and giving you energy.",
"While you are probably young, my educated guess is that alcohol sends you directly into heavy REM sleep very quickly, so you spend less time drifting in and out of REM and ... | [
"a lack of sleep can impact cognitive performance. For example, it might become difficult to stay focused and concentrate, and reaction times might also be slowed down. All these factors can affect work efficiency and cause accidents. All these consequences are dangerous for the individual but also for others, as ... |
What is the science behind using aluminium foil to protect food? | [
"Aluminium foil has a smooth shiny surface. Because of this it reflects back the heat raditations emitted by the food back to them which keeps the food warm for longer time. It is a good conductor but a very poor radiator and absorber. It is also cheap to produce in suitable sheet form.\n\nSource: _URL_0_"
] | [
"to other materials such as plastics or paper to make them more useful. Aluminium foil supplanted tin foil in the mid 20th century.\nAnnual production of aluminium foil was approximately 800,000 tonnes (880,000 tons) in Europe and 600,000 tonnes (660,000 tons) in the U.S. in 2003. Approximately 75% of aluminium foi... |
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