Newton's Second Law in 1 Dimension: The figure shows an acceleration-versus-force graph for a 125-g object. What should be the value of the first tick-mark on the vertical scale, as indicated by the arrow in the figure?

A. 4
B. 8
C. 0.00400
D. 0.00800


Answer: A

Physics & Space Science

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According to Kepler's second law, Halley's Comet circles the Sun in an elliptical path with the Sun at one focus of the ellipse. What is at the other focus of the ellipse?

a. nothing b. the Earth c. The comet itself passes through the other focus. d. The tail of the comet stays at the other ellipse.

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After I dip a cup of water from the ocean, I can conclude that

A. the ocean temperature is higher because it never loses its heat. B. the ocean temperature is higher because it has more molecules in it. C. the temperature of the water in the cup is the same as the temperature of the water in the ocean. D. the temperatures are the same but the water in the cup has more energy.

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What mass would have to be compressed to a radius of 1.0 × 10-15 m (the order of magnitude of the radius of an atomic nucleus) in order for it to become a black hole? (G = 6.67 × 10-11 N ? m2/kg2, c = 3.0 × 108 m/s)

A) 1.1 × 10-6 kg B) 4.1 × 10-8 kg C) 2.2 × 103 kg D) 6.7 × 1011 kg E) 8.3 × 1015 kg

Physics & Space Science

Earthquakes are caused by the

A) friction between diverging plates. B) sudden release of energy that is stored elastically in deforming rocks. C) expansion of Earth's crust. D) combined motion of tectonic plates.

Physics & Space Science