energy transfers

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Cards (24)

if the potential energy and kinetic energy of particles increase, then the internal energy increases
the sum of kinetic energy and potential energy is equal to the total energy of an object
latent heat of vaporisation is the amount of energy needed to change the state of a substance from a liquid to a gas
more collisions per second increases the pressure in something
conduction is where virating particles transfer energy to neighbouring particles
convection is where energetic particles move away from hotter to cooler regions
plastic is a poor conductor of heat so energy transfer from convection wont take place
efficiency is the useful output over the total input
wasted energy is the total input takeaway the useful output
as the speed increases the efficiency increases and it appears to have reached a limit therefore efficiency cannot go over 100%
if less energy is transferred to the thermal store more is transferred to the kinetic store
the reading on the ammeter is the amps multiplied by the ohms
The amount of energy in an object’s internal energy is the sum of the kinetic energy and potential energy stored in the object's particles.
lots of energy in the kinetic store causes high temperature
direct current is current that is always travelling in the same direction
lead will heat up the most because it needs less energy to raise the temperature by 1 degree
a bigger volume of water takes more energy to boil therefore more energy is transferred which costs more money
energy cannot be transferred by convection through a solid
if the air is cold the energy of the particles is decreased
if the energy of the particles is decreased then the spaces between the particles are decreased
energy is transferred through walls of objects by conduction
the energy of air around a cup is transferred by convection
Electrical work is
when electrical current transfers energy from one object to another.
The work done by a force is equal to the energy transferred to the object