Conservation of Energy and Power
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Last updated 4:27 PM on 9/11/22
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10 Terms
1
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Power
________ is the rate of energy transfer, or the rate of doing work.
2
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powerful machine
A ________ is one which transfers a lot of energy in a short space of time.
3
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cold spoon
A________ is dropped into an insulated flask of hot soup, which is sealed.
4
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created or destroyed
Energy can be transferred usefully, stored or dissipated but can never be created or destroyed.
5
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so the net change is zero
Energy transfers have occurred within the system, but no energy has left the system________.
6
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watts
Power is measured in
7
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P=E/t or P=W/t
The equation for power is
8
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does not allow transfer of matter in or out of the system
Closed system________, and is a hot and cold item together.
9
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1 joule of energy transferred per second
One watt equals________.
10
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usefully, stored or dissipated
Energy can be________, but not destroyed or created.
