Thunder is heard 2.2 seconds after Lightning is observed in Arizona when the temperature is 50°C. The best estimate of how far away the lightning struck is nearest:
(A) 820 m
(B) 790 m
(C) 730 m
(D) 650 m
Physics & Space Science
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If light travels 63,000 AU in 1 year at 3 × 10^8 m/s, which of these best represents the unit of a light-year?
a. 63,000 AU b. 3 × 10^8 m/s c. 1 year d. All of the other choices are correct.
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At closest approach Venus is about how far from Earth?
A) 0.7 AU B) 0.5 AU C) 0.4 AU D) 0.3 AU E) 0.1 AU
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If an atomic nucleus containing 64 nucleons has a radius R, what will be the expected radius of a nucleus containing 512 nucleons?
A) 8R B) 16R C) 4R D) R E) 2R
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