The attraction of the Moon causes tides on Earth. Because of friction, tidal action slows the rotation of Earth. What happens to the angular momentum of the Earth-Moon system, and does this affect the motion of the moon?
What will be an ideal response?
Since there are no external torques, the angular momentum is conserved. Since the Moon revolves around Earth in the same direction as Earth rotates, this means that the Moon's angular momentum about the center of mass of the Earth-Moon system has to increase.
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The study of energy levels in atoms is called
A) special relativity. B) general relativity. C) quantum mechanics. D) classical mechanics. E) particle physics.
Which of these moons has the densest atmosphere?
A) Europa B) Io C) Triton D) Titan E) Callisto
Three resistors with values R1, R2 and R3, respectively, are connected in parallel. Which of the following expresses the total resistance, RT, of the three resistors when connected in parallel?
a. RT = R1 + R2 + R3 b. RT = (1/R1 + 1/R2 + 1/R3) c. RT = R1 = R2 = R3 d. RT = (1/R1 + 1/R2 + 1/R3)?1
Pitch corresponds to
1) frequency, 2) noise, 3) loudness, whereas amplitude corresponds to 4) frequency. 5) noise. 6) loudness.