The Ptolemaic model of the solar system was useless for predicting planetary positions
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FALSE
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In some cases, we have seen extrasolar planets pass in front of their stars
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Rolling without slipping depends on
A) kinetic friction between the rolling object and the ground. B) static friction between the rolling object and the ground. C) normal force between the rolling object and the ground. D) tension between the rolling object and the ground. E) the force of gravity between the rolling object and the earth.
When U-235 undergoes fission, the total number of protons in the fragments is
A) 90. B) 91. C) 92. D) 93. E) none of the above
When a sample of water at 0.0°C is cooled to –36.0°C and freezes in the process, 935,000 kJ of thermal energy is liberated. What is the mass of this sample of water? For water LF = 334,000 J/kg, LV = 2
256 × 106 J/kg, and the specific heat of ice is 2050 J/kg ? C°. A) 2290 kg B) 1145 kg C) 2800 kg D) 12,700 kg