Considering Einstein's famous equation, E = mc2, which of the following statements is true?

A) Mass can be turned into energy, but energy cannot be turned back into mass.
B) It takes a large amount of mass to produce a small amount of energy.
C) A small amount of mass can be turned into a large amount of energy.
D) You can make mass into energy if you can accelerate the mass to the speed of light.
E) One kilogram of mass represents 1 joule of energy.


C

Physics & Space Science

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According to the Big Bang model, most of the ________ in the Universe were formed ________.

A. hydrogen and helium; in the interior of massive stars B. hydrogen and helium; during supernova explosions C. heavy elements; during the first 3 minutes D. hydrogen and helium; during the first 3 minutes

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Why do astronomers conclude that the Universe is filled with dark energy? Discuss two of the primary reasons

What will be an ideal response?

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A force can be exerted on an object and yet do no work

Indicate whether the statement is true or false

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When you walk barefoot in a room, the floor feels cooler walking on a tile floor as compared to a wooden floor because

A) tile has a smaller specific heat than wood. B) tile has a larger specific heat than wood. C) tile has a smaller thermal conductivity than wood. D) tile has a larger thermal conductivity than wood. E) none of the above

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