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chemistry mock > physics energy > Flashcards

physics energy Flashcards

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1
Q

what is the current of a hairdryer with the power of 1500w plugged into a socket with the potential difference of 230v?

A

current=power/potential difference
1500w/230v= current
current= 6.5 1dp (a)

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2
Q

write down the equation that links to efficiency, useful input energy transfer and useful output energy transfer

A

efficiency = useful output /total input

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chemistry mock (4 decks)

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