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If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?
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An object weigh 40n in air ,weigh 20n when submerged in water, and 30n when submerged in a liquid of unknown liquid density. what is the density of unknown of liquid?
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In addition to gravity, what is the other predominant force that affects the motion of a pendulum?
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1. A proton has a charge
Positive
Negative
Or neutral...
Positive
Negative
Or neutral...
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