Uranus and Neptune appear bluish in color because:
A) methane gas in their atmospheres absorbs red light well.
B) ammonia absorbs blue light well.
C) hydrogen and helium are both blue in large concentrations.
D) dust motes in their atmospheres scatter blue well, just as in our own blue sky.
E) from their distance, the Sun would appear hotter and bluer than from Earth.
A
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Equation of Traveling Waves: What are the wavelength (in meters) and frequency (in hertz) of a wave whose displacement is given by the equation y = 0.5 sin(0.20x + 120t), where x and y are in meters and t is in seconds?
A. 10 m, 0.50 Hz
B. 5.0 m, 10 Hz
C. 19 m, 120 Hz
D. 31 m, 19 Hz
E. 0.20 m, 120 
Hz
A flywheel's diameter is twice that of another of the same shape and mass. Rotational inertia of the larger flywheel is
A) two times greater. B) four times greater. C) the same as the other's. D) half.
You are driving home on a weekend from school at 55 mi/h for 110 miles. It then starts to snow and you slow to 35 mi/h. You arrive home after driving 4 hours and 15 minutes. How far is your hometown from school?
A) 180 mi B) 190 mi C) 200 mi D) 210 mi
A galvanometer can be converted to an ammeter by the addition of a
A) small resistance in parallel. B) large resistance in parallel. C) small resistance in series. D) large resistance in series.