If there is a high tide at noon, about when can you expect the next low tide?
A. around 9 PM
B. at about midnight
C. at about 3 PM
D. at about 6 PM
Answer: D
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What is the use of the Doppler effect able to tell you about the motion of an object? What is it unable to tell you?
What will be an ideal response?
A v vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the acceleration of the ball is zero. We know that at t = 5 s,
a. the slope of the curve is non-zero. b. the velocity of the ball is not changing. c. the curve is not crossing the time axis. d. the curve is at v = 0, t = 0.
When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s) that may be emitted as the atom eventually returns to the ground state?
a. 5 c. 4 b. 3 d. The correct value is not given.
The sky is blue because of
a. interference. b. diffraction. c. scattering. d. dispersion. e. polarization.