Energy And Energy Transfers Flashcards
1
Q
What are all the energy stores?
A
Gravitational potential, thermal, kinetic, electrostatic, elastic, chemical, nucleur and magnetic
2
Q
What are all the energy transfers?
A
Mechanical, electricall, heat, radiation, sound waves and light
3
Q
What is the unit of energy?
A
Joules
4
Q
What is the Equation for energy change or work done?
A
Power (W) X Time Taken (S)
5
Q
What is the equation for time taken?
A
Energy change (J) / Power (W) or Work done (J) / Power (W)
6
Q
What is the equation for power?
A
Energy change (J) / Time Taken (S) or Work Done (J) / Time Taken (S)
7
Q
Calculate the power of a light bulb that uses 40J of energy in 4 seconds
A
P=W/T 40J / 4S = 10W
