Most of the time, planets are observed to
A) be stationary with respect to background stars
B) move eastward with respect to background stars
C) move due south with respect to background stars
D) move westward with respect to background stars
B
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A mass attached to the free end of an ideal spring executes SHM according to the equation x = 0.50 sin(18. t) where x is in meters and t is in seconds. What is the maximum velocity of the mass?
A) 3 m/s B) 3 m/s C) 9 m/s D) 36 m/s E) 3 m/s
If you are driving down a highway at 65 mph with your headlights on, the speed of the light emitted from your headlights as seen by a person standing on the side of the road is
a. c. b. c + 65 mph. c. slightly greater than c. d. none of the above.
If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus?
a. Yes, there are 41 neutrons. b. Yes, there are 90 neutrons. c. Yes, there are 49 neutrons. d. No, more information must be given. e. No, there is no such thing as "niobium.".
One of the discoveries made by the Voyager probes while near Jupiter was
A) Io has a featureless surface that never changes. B) a thin ring of dust around the equator. C) the absence of a magnetic field around the giant planet. D) that the Great Red Spot is uniform and featureless. E) each of the four large moons produces a strong magnetic field.