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Umair56869969999
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#1
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#1
a radio uses 150 J of energy. 45J was given off as sound energy. The rest was given off as heat energy. How much heat energy was produced? What was the efficiency of the radio?
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username3477548
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#2
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#2
150-45
come on
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JAckieee.chan
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#3
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#3
(Original post by Umair56869969999)
a radio uses 150 J of energy. 45J was given off as sound energy. The rest was given off as heat energy. How much heat energy was produced?
Bruuuuhh.
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username5737602
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#4
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#4
There is no way you have the competence to make this thread but not answer that question
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Joinedup
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#5
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#5
Sound will be regarded the useful energy output of a radio heat will be the waste energy.

Efficiency is useful energy output divided by total energy input.
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