efficiency and power
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11 Terms
what is power?
the rate of an energy transfer or the rate of doing work
what does it mean if an appliance is powerful
the faster the rate it transfers energy
what is power meausred in?
Watts or kilowatts
what is 1 watt equal to?
the rate of transferring one joule of energy in 1 second
What does 1KW equal too?
1000 watts
what is the equation for power?
power= energy transferred to the appliance/ time taken for energy to be transferred
what is the equation for power in terms of work done?
power= work done/ time
energy transferred equals?
work done
what is the equation for efficiency in terms of power?
efficiency= useful power output/ total power input
what is the useful output power?
the useful energy per second transferred by it
what is the total input power?
the energy per second supplied to it
Note 
Flashcards (23)