A bullet moving at 244. m/s strikes a tree and penetrates a distance of 8.34 mm before stopping. Assuming a constant acceleration, how long did it take the bullet to stop?
What will be an ideal response?
68.4 microseconds
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It is possible to detect Doppler shifts due to light on each side of a rapidly spinning star. Suppose it is seen that a nearby star, relatively stationary to us, is blueshifted in light on one side of the star and redshifted in the light from the other side. Suppose a star of radius 
km has light shifted from 525 nm to 527 nm on one side and to 523 nm on the other. What is the rotational period of the star?
A. 34 h B. 32 h C. 24 h D. 16 h
What is steady state?
What will be an ideal response?
Which of the following is an example of antimatter?
A) neutron B) positron C) neutrino D) muon E) electron
Which type of electromagnetic wave travels through space the slowest?
A) All EM waves travel at the same speed. B) radio waves C) infrared D) ultraviolet E) microwaves