If you stood on a planet having a mass four times that of Earth's mass, and a radius two times that of Earth's radius, the gravitational force that the planet exerts on you would be
A) the same as Earth exerts on you.
B) two times more than Earth exerts on you.
C) two times less than Earth exerts on you.
D) four times more than Earth exerts on you.
A
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A) lead. B) aluminum. C) same on each
The current in an RLC circuit when driven at resonance depends on
A. the resonance frequency. B. the resistance. C. the inductive reactance. D. the capacitive reactance. E. More than one of these choices are correct.
Pulsars are thought to be ________
A) unstable high-mass stars B) accreting black holes C) rapidly rotating neutron stars D) accreting white dwarfs
Which one of the following does not contribute to the problem of greenhouse-effect heating of the atmosphere?
A) automobile engines B) wood stoves C) nuclear power plants D) coal-burning power plants E) Actually, all of the above contribute to the problem.