Work: Two men, Joel and Jerry, push against a car that has stalled, trying unsuccessfully to get it moving. Jerry stops after 10 min, while Joel is able to push for 5.0 min longer. Compare the work they do on the car.
A. Joel does 75% more work than Jerry.
B. Joel does 50% more work than Jerry.
C. Jerry does 50% more work than Joel.
D. Joel does 25% more work than Jerry.
E. Neither of them does any work.
Answer: E
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Jupiter orbits the Sun and follows which laws? Choose the best answer. I. Kepler's first II. Kepler's second III. Kepler's third IV. Newton's first V. Newton's second VI. Newton's third VII. Newton's law of gravitation
a. I, II, III, V, VI b. II, IV, VI, VII c. I, II, III, IV, V, VII d. I, II, IV, V, VI, VII
Video 1 (Chapter 19): If the lens of the eye cannot adjust enough to focus on a distant object, what kind of lens should be added to the optical system?
A. Converging lens B. Diverging lens C. A combination of a converging and a diverging lens. D. No lens can fix this.
The least massive stars, including our sun, eventually end their lives as
A) neutron stars. B) red giants. C) black holes. D) white dwarfs. E) quasars.
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