P1 Revision Flashcards
What is the equation for kinetic energy?
Energy(j) = 1/2 x mass x (velocity^2)(m/s)
What is the conservation of energy?
Energy can never be created or destroyed, just transferred from one to another.
What is the equation for elastic potential energy
Energy(j) = 1/2 x spring constant(n/m) x (extension^2)(m)
What is the equation for gravitational potential energy
Energy(j) = mass x gravitational field strength(n/kg) x height(m)
Define the specific heat capacity of a substance
The amount of energy needed to raise the temperature of 1kg of a substance by 1 degree Celsius
What are the units for specific heat capacity?
Joules, degree Celsius, kilogram
Definition of power
The rate of which energy is transferred (or which work is done)
State the two equations for power
Power= energy transferred/time
Power = work done/ time
What is the unit of power
Watt(w)
Give examples of chemical energy stores
Food
Fuel
Batteries
4 different stores of energy
Kinetic energy
Gravitational potential energy
Elastic potential
Chemical energy
