Consider a situation where a skater pulls her arms inward, causing her rotation rate to speed up. Angular momentum
a. is definitely conserved
b. is definitely not conserved
c. may or may not be conserved
d. none of the above
A
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If a star has an extrasolar planet, the amplitude of its radial velocity curve is related to the planet's
A) mass B) orbital shape C) orbital period D) radius
A fish looks up through the smooth surface of the water at a bear directly above it. To the fish,
A. the bear appears to be exactly where it really is. B. the bear appears to be further away than it really is. C. the bear appears to be closer to the point directly above the fish than it really is. D. the bear cannot be seen due to total internal reflection.
An athlete throws a ball with a velocity of 40 m/s at an angle of 20° above the horizontal. Which of the following statements is true in this case?
A) The vertical component of the velocity remains constant. B) The horizontal component of the velocity changes. C) The vertical component of the velocity changes sign after the ball attains its maximum height. D) The horizontal component of the velocity changes sign after the ball attains its maximum height. E) None of the given choices is correct.
The ____________________ of the Sun is not visible during a total solar eclipse
Fill in the blank(s) with correct word