System A transfers 100 calories to System B by heat. As a result of this process, which of the following is the result?
1.System A contains 100 calories less heat.
2.System B contains 100 calories more heat.
3.Both of these are true.
4.None of these are true.
4
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A converging lens will be prescribed by the eye doctor to correct which of the following?
a. farsightedness b. glaucoma c. nearsightedness d. astigmatism
Inside a space station in orbit around Earth:
a. there is no gravity because of the height of the station far above Earth. b. there is no gravity because the station is in orbit. c. gravity appears absent because everything is moving and accelerating together. d. objects have no mass because they are in orbit. e. gravitational effects feel the same as on Earth.
Spacetime is curved by
A) mass. B) the force of gravity. C) quantum fluctuations. D) the vacuum force.
According to Einstein's equivalence principle, which of the following cannot be distinguished from a system accelerating with uniform acceleration in the presence of no gravity by any measurement within the system?
A) a system moving with constant velocity in the presence of no gravitational force B) a system that only contains massless objects C) a system that is not accelerating, but is subject to a uniform gravitational acceleration D) a system that is moving at the speed of light E) a system in free fall