Energy, Work and power Flashcards
1
Q
Simple principle of conservation of energy
A
water fall’s from the sky turning potential energy to kinetic energy
2
Q
Multi-step principle of conservation of energy
A
Water can produce electricity. It falls down from the sky, converting potential energy to kinetic energy. This energy is then used to rotate the turbine of a generator to create electricity.
3
Q
What is the source of all energy except geothermal, nuclear and tidal
A
The sun is the source of all energy except for geothermal, tidal, and nuclear fission as the sun gives heat which creates wind and various products.
4
Q
How to find energy efficiency
A
(Energy out/energy in) x 100%
5
Q
Formula for work
A
W = Transfer of energy = Force x Displacment
6
Q
Formula for power
A
Work/Time
