A object on a spring undergoes SHM. When the object passes through the equilibrium position, which of the following statements about object-spring system are true? (There could be more than one correct choice.)
A) Its acceleration is zero.
B) Its speed is zero.
C) Its elastic potential energy is zero.
D) Its kinetic energy is a maximum.
E) Its total mechanical energy is zero.
A, C, D
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The Jovian problem refers to
a. the high speed with which the Jovian planets rotate on their axes. b. the large number of satellites that orbit each Jovian planet. c. the existence of rings around the Jovian planets. d. the excess heat radiated by the larger of the Jovian planets. e. the apparently short period of time that disks exist around stars from which Jovian planets can form.
If the Sun became twice as massive, your attraction to the Sun would double and your weight as measured on Earth would
A) double. B) quadruple. C) not change.
Radiant energy from the Sun is composed of shorter wavelengths than radiation from the Earth because the Sun
A) has much more thermal energy. B) has a higher temperature than the Earth. C) is an energy source while the Earth is primarily an energy receiver. D) none of the above
Two electric charges QA = + 1.0 ?C and QB= - 2.0 ?C are located 0.50 m apart. How much work is needed to move the charges apart and double the distance between them?
A) -36 × 10-3J B) +18 × 10-3 C) 0 D) +36 × 10-3 E) -18 × 10-3