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Related Flashcards
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Cards In This Set
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What is the wasted and useful energy of a Light Bulb?
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Useful - Light
Wasted- Heat
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Electrical heater
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Useful - Thermal energy to the surroundings
wasted - light from the glowing element.
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Electrical toaster
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Useful - thermal energy of bread
wasted - thermal energy of toaster case and air around it.
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Hairdryer
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Useful - heat energy of air flowing past the heater filament and kinetic energy of air driven by fan
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Electric motor
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Useful- kinetic energy of object driven by motor.and potential energy of objects lifted with motor
wasted - thermal and sound energy of motor
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Personal stereo
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Useful -kinetic energy of object
sound
wasted - thermal energy of motor.
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Computer disc drive
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Useful - energy stored in magnetic dots on disc
wasted - thermal and sound energy of the motor that drives the disc.
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