What is solar seismology?
A. the study of the Sun's atmosphere by analyzing waves in the Sun's interior
B. the study of the Sun's interior by analyzing waves in the Sun's atmosphere
C. the study of the Sun's changing size
D. the study of gravitational waves from the Sun
Answer: B
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The Hubble Space Telescope can detect Cepheids up to the distance of 100 Mpc
Indicate whether the statement is true or false
Waves on a String: A 2.31-kg rope is stretched between supports that are 10.4 m apart, and has a tension in it of 49.2 N. If one end of the rope is slightly tweaked, how long will it take for the resulting disturbance to reach the other end?
A. 0.699 s B. 0.720 s C. 0.664 s D. 0.615 s
Suppose you drop a 10-pound weight and a 5-pound weight on the Moon, both from the same height at the same time. What will happen?
A) Both will hit the ground at the same time. B) The 10-pound weight will hit the ground before the 5-pound weight. C) The 5-pound weight will hit the ground before the 10-pound weight. D) Both weights will float freely because everything is weightless on the Moon.
A boulder falls off a cliff toward the ground with no air resistance. The isolated system for which momentum is conserved is
1.only the Earth. 2.only the boulder. 3.both the Earth and the boulder. 4.none of these.