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Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon
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Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in
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The reason a penny thrown straight up inside a bus will come back to your hand is that you,the bus,the air inside the bus, and the penny are all moving at the same velocity. true or false
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