Suppose you live on the Moon. About how long is a day (i.e., from sunrise to sunrise)?
A) 23 hours 56 minutes
B) 24 hours
C) a month
D) a year
E) about 18 years
D) a year
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You drive your car at a constant 60 km/h along the highway. You apply the brakes until the car slows to 40 km/h. If at that moment you suddenly release the brakes, the car tends to
A) momentarily regain its higher initial speed. B) continue moving at 40 km/h. C) decrease in speed if no other forces act.
What element dominates the ice on the surface of Pluto?
a. methane b. nitrogen c. hydrogen d. carbon monoxide e. carbon dioxide
Auroras near the poles of the planets
a. are found on Earth. b. are found on Jupiter. c. indicate the presence of a magnetic field. d. occur when particles in the solar wind hit a planet’s atmosphere. e. all of the above.
A student attaches a length of nylon fishing line to a fence post. She stretches it out and shakes the end of the rope in her hand back and forth to produce waves on the line. The most efficient way for her to increase the wavelength is to
A. increase the tension on the hose and shake the end more times per second. B. decrease the tension on the hose and shake the end more times per second. C. increase the tension on the hose and shake the end fewer times per second. D. decrease the tension on the hose and shake the end fewer times per second. E. keep the tension and frequency the same but increase the length of the hose.