Convert a speed of 4.50 km/h to units of ft/min. (1.00 m = 3.28 ft)
A) 0.246 ft/min B) 82.3 ft/min C) 246 ft/min D) 886 ft/min E) 165 ft/min
C
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Why do astronomers believe that the Jovian planets must contain rocky material in their cores?
A. Because the Jovian planets have large magnetic fields. B. Because silicates and irons were part of the overall composition of the Solar nebula. C. Because the Jovian planets have large gravity. D. The statement of the question is incorrect. Astronomers believe that the Jovian planets consist exclusively of hydrogen and helium.
A heater is rated at 1200 watts for a 120-volt source.The resistance of the heater is __________
Fill in the blank(s) with correct word
If the speed of light were infinite but the postulates of special relativity still held, then
A. time dilation would be obvious at low speeds. B. length contraction would not occur. C. objects could have negative kinetic energy. D. any moving object would have infinite momentum.
Using a Michelson interferometer and a light source of 400nm, a change from bright to dark indicates a change in distance of
a. 
b. 
c. 
d. 