The average salinity of ocean water is
A) 96.5 parts per thousand.
B) 16 parts per thousand.
C) 35 parts per thousand.
D) 3.5 parts per thousand.
Answer: C
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The thermal motions of the atoms in a gas cloud can make it collapse to form a protostar
a. True b. False Indicate whether the statement is true or false
Assuming that we can measure the apparent brightness of a star, what does the inverse square law for light allow us to do?
A) Calculate the star's luminosity if we know its distance, or calculate its distance if we know its luminosity. B) Determine both the star's distance and luminosity from its apparent brightness. C) Determine the distance to the star from its apparent brightness. D) Calculate the star's surface temperature if we know either its luminosity or its distance.
An ideal gas is to taken reversibly from state i, at temperature T1, to any of the other states labeled I, II, III, IV, and V on the p-V diagram below. All are at the same temperature T2. Rank the five processes according to the change in entropy of the gas, least to greatest.
A. I, II, III, IV, V B. V, IV, III, II, I C. I, then II, III, IV, and V tied D. I, II, III, and IV tied, then V E. I and V tied, then II, III, IV
A typical automobile consumes about 70 kW of power from the gas tank. How many 100-watt light bulbs could this light up, if the energy were used to light electric bulbs rather than to run the car?
A) 7 bulbs B) 700 bulbs C) 7000 bulbs D) 70 bulbs E) This question cannot be answered without knowing the amount of time the car is being driven at this power.