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1.9 Energy And Power (Year 10 Physics)
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Question 1
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A microwave transfers 120,000 joules in 60 seconds. What is its power rating?
How do you calculate efficiency using power?
Which energy transfer is involved when a bulb lights up?
Order of magnitude calculations give a value rounded to:
What does wasted power mean?
Calculate the efficiency if useful power out is 250 W and total power in is 500 W.
Which appliance typically uses the highest power?