Most of Earth's accessible fresh water is located in
A) polar ice caps and glaciers.
B) groundwater.
C) rivers, lakes, and streams.
D) the atmosphere.
Answer: B
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A spherical air bubble originating from a scuba diver at a depth of 30.0 m has a diameter of 1.0 cm. What will the bubble's diameter be when it reaches the surface? (Assume constant temperature.)
a. 0.7 cm c. 1.4 cm b. 1.0 cm d. 1.6 cm
Why didn't a planet form in the region of the solar system now occupied by the asteroid belt?
A. It was too cold for a rocky planet to form beyond Mars. B. Orbital resonances with Jupiter disrupted orbits in this region. C. Gravitational encounters with jovian planets kicked most of this material out into the Oort cloud. D. There was never enough material to form a planet.
A 5-mol ideal gas system undergoes an adiabatic free expansion (a rapid expansion into a vacuum), going from an initial volume of 10 L to a final volume of 20 L. How much work is done on the system during this adiabatic free expansion?
a. -50 J c. zero b. -10 J d. +50 J
Suppose you put a chocolate layer on pieces of candy. Compared with the amount of chocolate used to cover 1 pound of large pieces, if you cover 1 pound of smaller pieces you'll use
A) less chocolate. B) the same amount of chocolate. C) more chocolate. D) makes no difference