A satellite is in an elliptical orbit around Earth. At one point on the ellipse, it is 40 × 106 m from the center of Earth and has a speed of 10,000 m/s. At another point on the ellipse its speed is 9100 m/s
How far from the center of Earth is the second point? The mass of Earth is 5.97 × 1024 kg and G = 6.67 x 10-11 N•m2/kg2. A) 2.9 × 108 m
B) 4.3 × 108 m
C) 6.7 × 107 m
D) 8.6 × 107 m
E) 9.1 × 107 m
A
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The kinetic energy of a bullet, per gram, is
A. about the same as the energy released from 1 gram of TNT B. about the same as the kinetic energy in a typical 1-gram meteor C. about the same as the energy released by 1 gram of chocolate chip cookies D. none of the above
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In 1983 the standard meter was redefined to what it is currently. What was the previous definition from 1960 based on?
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