Upgrade to remove ads
Only $2.99/month

P1 Energy AQA

Terms in this set (30)

conservation of energy
Energy cannot be created or destroyed
dissipated energy / dissipation of energy
the energy that is not usefully transferred and stored in less useful ways
closed system
a group of objects that transfer energy only to each other
% energy Efficiency
(Useful energy output / total energy input) x 100
Power equation
Energy transferred / time
1 watt
The unit of power when one joule of work is done in one second
Wasted energy
Energy that is not usefully transferred
Work done
force x distance
work
energy used to cause an object that has mass to move
kinetic energy
energy stored in moving objects
Kinetic energy equation
KE= 1/2 x mass x velocity squared
gravitational potential energy
Energy stored by objects due to their position above Earth's surface.
GPE equation
GPE=mass x gravitational pull x height gain
Power equation (work)
Power = work done (J)/ time taken (s)
Power equation (energy)
Power(W)=Energy transferred (j) /time taken (s)
energy transferred
work is done when this happens
chemical energy
potential energy stored in chemical bonds
thermal energy
energy stored in hot objects
Friction
A force that opposes motion and causes energy to be wasted
% power Efficiency
(Useful power output / total power input) x100
fossil fuel
non renewable fuel includes coal, crude oil and gas
Renewable energy resource
source of energy that is replaced as fast as it is consumed
Non renewable energy resource
source of energy that takes longer to replace than to consume
wind, biofuel, hydroelectric, geothermal, tidal, waves and solar
7 examples of renewable energy resources
insulator
material that reduces unwanted transfers of heat
specific heat capacity
energy needed to raise 1kg of material by 1 degrees C.
coal, oil and gas
non renewable pros: reliable and cheap cons:produces C02 causes global warming
wind
renewable pros: no CO2 cons: unreliable, expensive to install, unsightly
solar
renewable pros: no CO2 cons: unreliable (can't work at night), expensive to install
biofuel
renewable pros: reliable and CO2 neutral: cons: uses land meant for crops produces smoke pollution
THIS SET IS OFTEN IN FOLDERS WITH...