Rills on the Moon are believed to have been caused by
a. moonquakes.
b. meteorite impacts.
c. volcanoes.
d. expansion and contraction of the Moon's surface.
a
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John's mass is half the mass of Jill. They both start walking and John moves twice as fast as Jill. What is the ratio of the kinetic energy of Jill to the kinetic energy of John?
A) 4 B) 2 C) 1 D) 1/2 E) 1/8
Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.20 × 10^?6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 10^10 decays/s)
a. 1.3E+5 b. 1.1E+2 c. 3.5E–6 d. 4.1E+12 e. 2.9E+12
The footprints left on the moon by the Apollo astronauts will likely last for
A) millions of years. B) no time; they were quickly erased by micrometeorites. C) the remaining existence of the Moon. D) a few decades.
The coefficient of linear expansion of aluminum is 24 × 10-6K-1 and the coefficient of volume expansion of olive oil is 0.68 × 10-3K-1
A novice cook, in preparation for deep-frying some potatoes fills a 1.00-liter aluminum pot to the brim and heats the oil and the pot from an initial temperature of 15°C to 190°C. To his consternation some olive oil spills over the top. How much? A) 0.11 liters B) 0.12 liters C) 0.13 liters D) 0.14 liters E) 0.15 liters