The most distant point in the Moon's orbit is called _________________
a. apogee b. perigee
c. perihelion d. aphelion
a
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Waves on a String: A string of length L is under tension, and the speed of a wave in the string is v. What will be the speed of a wave in the string if the length is increased to 2L but with no change in the mass or tension?
A. v/2
B. v/
C. v
D. 2v
E. 4v
If a source of light is approaching us at 3,000 km/sec, then all its waves are:
A) blue shifted by 1%. B) redshifted by 1%. C) not affected, as c is constant regardless of the direction of motion. D) blue shifted out of the visible spectrum into the ultraviolet. E) redshifted out of the visible into the infrared.
Consider the following statement: "Rocky asteroids are found primarily in the asteroid belt and Kuiper belt, while icy comets are found primarily in the Oort cloud." What's wrong with this statement?
A) The Kuiper belt contains icy comets, not rocky asteroids. B) Asteroids are not really made of rock. C) Comets are not really icy. D) The Oort cloud has nothing to do with comets. E) The statement is accurate as written.
From a latitude of 60 degrees north during the winter, the Sun will
A) spend most of each day below the horizon. B) spend most of each day above the horizon. C) never be seen above the horizon. D) end a few weeks continuously below the horizon.