Energy And efficiency Flashcards
(5 cards)
1
Q
What is the equation for gravitational potential energy
A
Gpe=1/2 x mass x velocity squared
2
Q
What is the word equation for energy
A
Energy= power x time
3
Q
Kinetic energy what is the word equation for it
A
Kinetic energy = power x time
4
Q
A fuel burning power station uses 2000 joules if fuel energy to generate 600 of electrical energy. The rest of the fuel energy is wasted as heat.
For every 600 joules of electrical energy generated how much fuel energy is wasted as heat
A
1400j
5
Q
Give one disadvantage of using a wind generator to charge a battery
A
It needs to be windy for a battery to charge
