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7. The density of gold is 19 300 kg/m³. What is the mass of a gold sphere whose diameter is 0.25 m? A) 87.5 kg B) 158 kg C) 947 kg D) 1260 kg E) 3790 kg

7. The density of gold is 19 300 kg/m³. What is the mass of a gold sphere whose diameter is 0.25 m? A) 87.5 kg B) 158 kg C) 947 kg D) 1260 kg E) 3790 kg

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7. The density of gold is 19 300 kg/m³. What is the mass of a gold sphere whose diameter is 0.25 m? A) 87.5 kg B) 158 kg C) 947 kg D) 1260 kg E) 3790 kg 8. At standard temperature and pressure, carbon dioxide has a density of 1.98 kg/m?. What volume does 1.70 kg of carbon dioxide occupy at standard temperature and pressure? A) 0.43 m3 B) 0.86 m3 C) 1.7 m3 D) 2.3 m3 E) 4.8 m3 9. A child wants to pump up a bicycle tire so that its pressure is 1.2 x 105 Pa above that of atmospheric pressure. If the child uses a pump with a circular piston 0.035 m in diameter, what force must the child exert? A) 120 N B) 89 N C) 76 N D) 54 N E) 240 N
Transcribed Image Text:7. The density of gold is 19 300 kg/m³. What is the mass of a gold sphere whose diameter is 0.25 m? A) 87.5 kg B) 158 kg C) 947 kg D) 1260 kg E) 3790 kg 8. At standard temperature and pressure, carbon dioxide has a density of 1.98 kg/m?. What volume does 1.70 kg of carbon dioxide occupy at standard temperature and pressure? A) 0.43 m3 B) 0.86 m3 C) 1.7 m3 D) 2.3 m3 E) 4.8 m3 9. A child wants to pump up a bicycle tire so that its pressure is 1.2 x 105 Pa above that of atmospheric pressure. If the child uses a pump with a circular piston 0.035 m in diameter, what force must the child exert? A) 120 N B) 89 N C) 76 N D) 54 N E) 240 N
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