energy stores

. kinetic store . chemical . elastic potential .nuclear store . gravitational potential . thermal energy store .magnetic store . electrostatic

mechanic= moving objects heating=temperature radiation= wave or sound electricity= electric current

kinetic= 1/2 x mass(kg) x speed 2(m/s)

G.P.E= mass(kg) x gravitational field strength(N/kg) x height(m)

energy transferred(j) / time (s)

work done = force *distance

the specific heat capacity of a substance is the amount of energy required to raise the temperature

change in thermal energy= mass x specific heat capacity x temperature

energy can be transferred usefully, stored or dissipated but it cannot be created or destroyed

. use a lubricant . remove the air particles from around the pendulum

power is the rate at which energy is transferred or the rate at which work is done

power= energy transferred / time

power= work done / time

efficiency = useful power output / total power input

the higher the thermal conductivity of a material, the higher the rate of energy transfer by conduction across that material.

. construct the building using materials with a low thermal conductivity. . build the house with thick walls as this also reduces the rate of thermal energy transfer