When I person is asleep, his power output is 50W. If the person sleeps from 11:00pm to 7:00am, how many kilojoules of energy has he expended? A. 25 kJ
B. 240 kJ
C. 288 kJ
D. 1400 kJ

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..

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