When a bar magnet is thrust at the same speed into a coil having twice the number of loops, the induced voltage is
A) half.
B) the same, no different.
C) twice as much.
D) four times as much.
E) none of the above
Answer: C
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In the Copernican system, Earth moves slower along its orbit than the planets that lie farther from the Sun
a. True b. False Indicate whether the statement is true or false
Suppose you launch two probes in opposite directions from the Space Station and they meet as they orbit Earth. According to general relativity, why does this happen?
A) They are following the straightest possible paths through spacetime, and those paths curve so that the probes meet. B) They are following the allowed orbits according to Newton's universal law of gravitation. C) The force of gravity tugs on the probes and forces them to orbit the Earth. D) Objects launched in space always follow circular paths, no matter where they are.
Two children start at one end of a street, the origin, run to the other end, then head back. On the way back Joan is ahead of Mike. Which statement is correct about the distances run and the displacements from the origin?
a. Joan has run a greater distance and her displacement is greater than Mike's. b. Mike has run a greater distance and his displacement is greater than Joan's. c. Joan has run a greater distance, but her displacement is less than Mike's. d. Mike has run a greater distance, but his displacement is less than Joan's. e. Mike has run a shorter distance, and his displacement is less than Joan's.
The leading hemisphere of Iapetus is much darker than the back side, which is icy
Indicate whether the statement is true or false