You lift a 1 kilogram object [weight on Earth = 10 N] by 1 meter. How much does the object's energy increase?
A) 1 joule
B) 10 watts
C) 1 watt
D) 10 joules
E) Its energy doesn't change at all.
D
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Put the following events into the correct order in which they are thought to have occurred according to the impact hypotethesis.
A square loop (L = 0.20 m) consists of 50 closely wrapped turns, each carrying a current of 0.50 A. The loop is oriented as shown in a uniform magnetic field of 0.40 T directed in the positive y direction. What is the magnitude of the torque on the loop?
A. 0.21 N ? m B. 0.20 N ? m C. 0.35 N ? m D. 0.12 N ? m E. 1.73 N ? m
What does the Milky Way look like on the night sky?
A. a spiral-shaped region of nebulosity B. a uniform scattering of stars throughout the sky C. a pale band of light scattered with stars that stretches across the sky D. The Milky Way is not visible from Earth without a telescope.
Consider the following pairs of points: F: 0°N, 40°W G: 70°N, 60°W 0°N, 20°W 70°N, 40°W H: 20°S, 130°E J: 30°S, 170°E 20°S, 150°E 30°S, 170°W Which pair is closest together?
a. J b. F c. G d. H e. All are the same distance apart.