Which statement must be true in order for a rocket to travel from Earth to another planet?
A) It must carry a lot of extra fuel.
B) It must have very large engines.
C) It must attain escape velocity from Earth.
D) It must be launched from space, rather than from the ground.
Question 2
Which of the following is not true of the special theory of relativity?
A) The special theory does not apply to situations that involve substantial acceleration or gravity; for that, you need the general theory of relativity.
B) For low speeds, the theory predicts effects that are so small that they cannot be noticed without extremely precise, high-tech measurement.
C) The theory is valid only at speeds close to the speed of light.
D) The theory tells us that there is no such thing as absolute time or space, because measurements of time and space depend on your reference frame.
The Sun is the nearest star to Earth.
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