27. In a nuclear power plant, the fuel rods contain about about __fissionable material.
A) 90%, 4% B) 90%, 90%
C) 4%, 4%
D) 4%, 90%

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C)4%, 4%

relative humidity is a measure of the amount of moisture in the air relative to the total amount of moisture the air can hold.

so d

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.