A balloon originally has a volume of 1.0 m3 when the gas in it is at 20°C and under a pressure of 1.0 atm. As it rises in the earth's atmosphere, its volume expands
What will be its new volume if its final temperature and pressure are -40°C and 0.10 atm?
A) 8.0 m3 B) 6.0 m3 C) 4.0 m3 D) 2.0 m3
A
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Why do nuclear fusion reactions only take place in the interior of a star?
a. The magnetic fields are strongest there. b. The temperature is the hottest in the center. c. The density of material is very high in the center. d. Both (b) and (c) e. FALSE; Nuclear fusion reactions can take place in the core and corona where temperatures are high enough.
If a white dwarf gains sufficient mass, it can become a:
A) brown dwarf. B) type II supernova. C) type I supernova. D) planetary nebula. E) black dwarf.
Among the other planets, probably the most likely place to find evidence for life either now or in the past is on
A) Venus B) Mercury C) Jupiter D) Mars
Which object has larger kinetic energy: a 500-kg object moving with a speed of 40 m/s or 1000-kg object moving at 20 m/s?
A) the 500-kg object moving at 40 m/s B) Both have same kinetic energy. C) the 1000-kg object moving at 20 m/s D) Kinetic energy is independent of mass. E) Kinetic energy is independent of speed.