Physics Revision
Elastic Potential Energy (Equation)
Ek=1/2 x K (N/M) x Extention (M)
Kinetic Energy (Equation)
Ek = 1/2 x mass (kg) x speed (m/s)
Gravitational potential energy (Equation)
GPE = mass (kg) x 9.8(n/kg) x height (kg)
what is kinertic energy
movement that requires energy
What is Elastic potential Energy
The rate of which something is pulled to earth
What is elastic potential energy
the energy needed to strech an object
what is specific heat capacity (SHC)
the amount of thermal energy needed to raise 1kg of substance by 1•c
Mass and SHC are...
Constant
Gradient =
Change in y / Change in x
energy transfer in solids
Conduction
Energy transfer in liquids and gasses
Convection
when particles in a solid heat up
they
Vibrate faster
Convection current in 5 steps:
1. particles become hotter and gain more kinetic energy
2. they become less dense and spaced out
3. less dense particles begine to rise
4. as they rise they loose kinetic energy and become more dense
5. they begin to sink before being heated again
define power
the rate at which energy is transfered or work is done
how many joules are tranfered each second if the power is 1watt
1 Joule/ second
Law of conservation of energy
Energy cannot be created or destroyed