Suppose you have a collection of pendullums of different lengths suspended on a string between two pegs as shown in this figure. Two of the pendulums have the same length and resonate with each other. If the mass of the bob of one of the two pendulums in resonance is doubled while the mass of the other remains the same, the two:
a. will still be in resonance.
b. will no longer be in resonance.
c. will resonate at twice the frequency.
d. will resonate at a frequency that is not double.
a
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Which of the following statements best describes the difference between a refracting telescope and a reflecting telescope?
A) A refracting telescope uses a transparent glass lens to focus light, whereas a reflecting telescope uses a mirror to focus light. B) A refracting telescope produces refracted images, whereas a reflecting telescope produces reflected images. C) Reflecting telescopes make much clearer images than refracting telescopes of the same size. D) It is much easier to make a large refracting telescope than a large reflecting telescope.
Wien's law can only tell us about the surface temperature of a star, not the temperatures of the star's interior.
Answer the following statement true (T) or false (F)
Briefly summarize the observed patterns of motion in our solar system that are consistent with the nebular theory
What will be an ideal response?
A ball falls to the ground from height h and bounces to height h'. Momentum is conserved in the ball-earth system
a. no matter what height h' it reaches. b. only if h' < h. c. only if h' = h. d. only if h' > h. e. only if h' ? h.