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Related Flashcards
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Cards In This Set
| Front | Back |
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Define Energy |
Engery is difined as the ability to do work |
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What units are used to measure energy? |
joules |
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Define nonrenewable energy resources |
Exist in limited quantities and once used can't be replaced for millions
of years
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what is energy conversion? |
The process of energy changing from one form to another.
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What is the law of conservation of energy? |
energy can't be created or destroyed |
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Give examples of nonrenewable energy resources |
oil, natural gas, coal, uranium |
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define renewable energy resources |
Resources that can be replaced in a relatively short period of time.
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examples of renewable energy resources |
hydroelectric, solar, geothermal, wind, biomass |
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Kinetic Energy |
Kinetic engery = 1/2 x mass x speed2
KE = 1/2 x m x v2 |
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Gravitational Potential Energy |
Gravitational potential energy = Mass x g x height
GPE = m x g x h |
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Work Done |
Work Done = Force x distance moved
W = F x D |
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Efficiency |
Efficiency = Useful Energy output / Total Energy Input |
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Power |
Power = Work Done / Time Taken
P = W / T |
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Conduction |
When thermal energy is transferred from the hot end to the cold end
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Convection |
The water above the flame becomes warmer, it expands and becomes less dense. It rises upwards as cooler, denser water sinks and displaces it (pushes it our of the way). The circulating stream is called Convection Current
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