Hi I am studying for an exam and need help with this question. Can you explain it please? Thank you
1.How much work will a 1.4-kW power supply produce in a 29.5-sec time?
2. A 60-W light bulb is on for 2.5 hours. How much energy is used?
3. How long will it take for a 1.9-kW motor to do 55000 Joules of work?
4. What is the minimal power required to lift a 7000-kg helicopter straight up with a constant speed of 2.5 m/s?