Energy Resources and Transfers Flashcards
What are the 8 main stores of energy?
Chemical, gravitational, thermal, electrostatic, kinetic, elastic, magnetic, nuclear
What is the “conservation of energy”
energy cannot be made or destroyed by transferred between different energy stores
the total amount of energy in a closed system remains constant
What are the 4 main transfer types between energy stores?
mechanically, electrically, by heating, by radiation
State the equation used to calculate the efficiency of a system
efficiency = useful energy output / total energy input * 100
How can thermal energy be transferred?
conduction, convection, radiation
what is the equation for work done?
work done (J) = force * distance moved
What is the relationship between work done and energy transferred?
work done = energy transferred
What is the equation used to calculate the change in GPE
GPE = mgh
What is the equation used to calculate kinetic energy?>
KE = 1/2mv^2
What is power?
the rate at which energy is transferred
work done per unit of time
What is the equation to calculate the power of a device?
Power = work done / time taken
