Much of the water on Mars
A) is found in deep pools near the equator.
B) lies in shallow pools near the poles.
C) is in the form of clouds.
D) is locked in the seasonal ice cap.
E) is thought to be in a layer of permafrost just below the surface.
E
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Four coins, each with a Head and a Tail, are tossed randomly on to a table. The microstate is defined as the "number of Heads showing". The number of Heads can be, 0, 1, 2, 3, 4. What value for the "number of Heads showing" has the greatest number of microstates?
A. 0 B. 1 C. 2 D. 3 E. 4
Each choice describes how a few astronomical phenomena are related to time periods. Which list is entirely correct? (Careful: some lists are partially correct.)
A) Earth's rotation defines a day. The cycle of the Moon's phases takes about a month. Earth's orbit defines a year. Earth's cycle of axis precession takes 26,000 years. B) Earth's rotation defines a day. The cycle of the Moon's phases takes about a week. Earth's orbit defines a year. Earth's cycle of axis precession defines a month. C) Earth's rotation defines a day. The Sun's rotation defines a week. The Moon's rotation defines a month. Earth's orbit defines a year. D) Earth's rotation defines a day. The Saros cycle of eclipses defines a month. Earth's orbit defines a year. Earth's cycle of axis precession takes 26,000 years.
The position of a mass that is oscillating on a spring is given by x = (17.4 cm) cos[(5.46 s-1)t]. What is the angular frequency for this motion?
A) 0.183 rad/s B) 5.46 rad/s C) 2.34 rad/s D) 17.4 rad/s E) 0.869 rad/s
After a ball tossed upward leaves your hand, the force of gravity on it
A) no longer acts. B) gradually diminishes. C) gradually increases. D) remains constant. E) changes direction.