equations Flashcards
equation for charge
q=it
charge= current x time
coulombs,amps,seconds
equation for kinetic energy
ek=1/2 mv(squared)
kinetic energy= 1/2 x mass x velocity
joules,kg,m/s
equation for gravitational potential energy
ep=mgh
gravitational potential energy=mass x gravitational field strength x height
joules,kg,9.8N,metres
equation for current
i=v/r
current=voltage/resistance
amps,volts,ohms
equation for elastic potential
ee=1/2 ke(squared)
elastic potential= 1/2 x spring constant x extension
joules,n/m,m
equation for thermal energy
change in energy= mass x spefic heat capacity x change in temperature
kg,j/kg°C,°C
equation for power energy
p=e/t
power=energy transferred/time
watts,joules,second
equation for power work
p=w/t
power=work done/time
watts,joules,second
equation for effiency
efficiency=useful ouput energy transfer/total input energy transfer
equation for voltage
v=ir
voltage= current x resistance
volts,amps,ohms
equation for energy transferred involving power
e=pt
energy transferred=power x time
joules,watts,seconds
equation for energy transferred involving charge flow
e=qv
energy transferred= charge x voltage
joules,coulombs,voltage
equation for power involving voltage
p=vi
power=voltage x current
watts,volts,amps
give the equation for finding power, if you dont know the voltage
p=i²r
power=current² x resistance
watts,amps,ohms
equation for density
density=mass/volume
kg/m³,kg,m³
