Explain the difference between energy and power.

Power is the rate at which energy is transferred. For example, a typical kettle may use 1.2 kiloWatts (kW) for about 2 minutes to boil water. This means that the kettle uses 1200 Joules of energy per second (Js-1) for 120 seconds. We can work out the total energy this takes using the equation:Power = Energy / TimeRearranging for energy gives us:Energy = Power × TimeSo:Energy = 1200Js-1 × 120s= 144,000JSo, in this example, a kettle requires 1200 Watts of power for 2 minutes to boil the water, or 144,000 Joules of energy in total.

HJ
Answered by Henry J. Physics tutor

3267 Views

See similar Physics GCSE tutors

Related Physics GCSE answers

All answers ▸

What was the Rutherford gold foil experiment


What is the equation linking Power, Time, and energy? and Calculate the work done by a cyclist when his power output is 200 W for 1800 seconds?.


How does current travel in a parallel circuit?


Calculate the charge that flows past a point in a circuit with a 5.0A current for five minutes.


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences