A mass, m, is hung from a spring that has a spring constant, k, and the system is set into oscillation. The period of the oscillation is measured and recorded as T. If the mass is doubled and the spring is replaced by a less-stiff one that has half the spring constant, k/2, what will happen to the subsequent period of oscillation of the new spring-mass combination?
1.It will remain the same.
2.It will quadruple.
3.It will double.
4.It will halve.
3
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The escape velocity at the event horizon around a black hole is
a. smaller than the speed of light. b. equal to the speed of light. c. much larger than the speed of light. d. irrelevant since nothing (including light) can escape from a black hole.
Escape Speed: Planet A has twice the mass of Planet B. From this information, what can we conclude about the escape speed for Planet A compared to that of Planet B?
A. The escape speed for Planet A must be twice as great as the escape speed from Planet B. B. The escape speed for Planet A must be four times as great as the escape speed from Planet B. C. The escape speed for Planet A is the same as the escape speed from Planet B. D. The escape speed for Planet A is greater than the escape speed from Planet B, but we cannot say how much greater. E. We cannot conclude anything about the escape speed for Planet A without knowing the radii of the two planets.
The leaves of a positively charged electroscope diverge more when an object is brought near the knob of the electroscope. The object must be:
A) a conductor B) an insulator C) positively charged D) negatively charged E) uncharged
A mass attached to a spring vibrates back and forth. At maximum displacement,
A) velocity reaches zero. B) acceleration reaches a maximum. C) net force reaches a maximum. D) velocity reaches a maximum.