According to relativity theory, if a space trip finds a son or daughter biologically older than their parents, then the space trip is taken by the
A) son or daughter.
B) parents.
C) either of these
D) neither, it can't be done.
Answer: B
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Electric potential and electric potential energy are _
A. one and the same in most cases B. two terms for the same concept C. both of these answers D. neither of these answers
If the voltage applied to a parallel-plate capacitor is doubled, the electric field between the plates
A) is halved. B) quadruples. C) is tripled. D) remains the same. E) is doubled.
What is the mass of the supermassive black hole in the center of the Andromeda galaxy?
A. 10 times the mass of our Sun. B. 5000 billion times the mass of our Sun C. 400 billion times the mass of our Sun D. 30 million times the mass of our Sun E. 20 thousand times the mass of our Sun.
An earthquake of what magnitude on the Richter scale is the smallest felt by humans?
a. 1 b. 2 c. 0 d. 4