centerpiece stringclasses 4 values | options sequence | correct_options sequence | correct_options_idx sequence | correct_options_literal sequence |
|---|---|---|---|---|
Things that are equivalent according to the equivalence principle are | [
"space and time.",
"a traveling twin and a stay-at-home twin.",
"gravity and acceleration.",
"mass and energy."
] | [
"C"
] | [
2
] | [
"gravity and acceleration."
] |
Colors in a soap bubble result from light | [
"converted to a different frequency",
"deflection",
"interference",
"polarization"
] | [
"C"
] | [
2
] | [
"interference"
] |
A model airplane flies slower when flying into the wind and faster with wind at its back. When launched at right angles to the wind a cross wind its groundspeed compared with flying in still air is | [
"the same",
"greater",
"less",
"either greater or less depending on wind speed"
] | [
"B"
] | [
1
] | [
"greater"
] |
Which of these three elements has the most mass per nucleon? | [
"Hydrogen",
"Iron",
"Uranium",
"Same in each"
] | [
"A"
] | [
0
] | [
"Hydrogen"
] |
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