Mr. Keiths Power and Energy Videoquiz

What is the equation for power when it is defined as the rate at which energy is transferred?

• Power = Work done / Time

• Power = Energy transferred / Time

• Power = Energy transferred * Time

• Power = Time / Energy transferred

What is the unit of measurement for power?

• Kilojoules

• Watts

• Seconds

• Joules

If a lamp transfers 1500 joules over 30 seconds, what is its power in watts?

• 70 watts

• 60 watts

• 50 watts

• 40 watts

If an 1100 watt microwave is on for three minutes, how much energy is transferred in kilojoules?

• 150 kilojoules

• 198 kilojoules

• 110 kilojoules

• 220 kilojoules

If you have to do 9 kilojoules of work over the course of 20 seconds, how much power are you using in watts?

• 200 watts

• 350 watts

• 600 watts

• 450 watts