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Hi I am studying for an exam and need help with this question. Can you explain it please? Thank you

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1.How much work will a 1.4-kW power supply produce in a 29.5-sec time?

W =?


2. A 60-W light bulb is on for 2.5 hours. How much energy is used?

E =?


3. How long will it take for a 1.9-kW motor to do 55000 Joules of work?

t =?


4. What is the minimal power required to lift a 7000-kg helicopter straight up with a constant speed of 2.5 m/s?

P =?

Top Answer

1. w = 4 1 . 3 k j 2. e n e r g y u s e d =... View the full answer

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