Energy Flashcards
energy stores
thermal
kinetic
gravitational potential
elastic potential
chemical
magnetic electrostaticic
nuclear
what happens if a system changes
the energy is transferred
work done
when current flows or by a force moving a object
specific heat capacity
substance amount of energy to raise the temperature of 1 kg of the substance by 1* C
j - kj
divide by 1000
kinetic energy
energy stored in a moving object
gravitational potential energy
energy stored due to an objects positon above
elastic potential energy
energy stored in stretched spring
thermal energy
energy stored due to an objects temp
elastic potential energy
energy stored in stretched spring
what does friction cause
energy is transferred to thermal energy
what does friction cause
energy is transferred to thermal energy
reducing unwanted energy transfers
using lubricants on fixed points
removing air particles from the points
reducing unwanted energy transfers
using lubricants on fixed points
removing air particles from the points
mechanical work
using a force to move an object
electrical work
a current transferring energy
electrical work
a current transferring energy
work done equation
work done (j)=force (n) times distance (m)
work done equation
work done (j)=force (n) times distance (m)
work done equation
work done (j)=force (n) times distance (m)
work done equation
work done (j)=force (n) times distance (m)
work done equation
work done (j)=force (n) times distance (m)
work done equation
work done (j)=force (n) times distance (m)
power equations 1
power w = energy transferred j / time s
power equation 2
power w = work done j /time s
efficiency equation 1
efficiency = useful output energy transfer/ total input energy transfer
efficiency equation 2
efficiency =
efficiency equation 2
efficiency = useful power output/
efficiency equation 2
efficiency = useful power output/ total power input
thermal conductivity
higher the conductivity of a material the higher rate of energy transfer by conduction across that material
thermal conductivity
higher the conductivity of a material the higher rate of energy transfer by conduction across that material
specific heat capacity practical
put beaker o balance and press 0
