Heat transfer Flashcards
science (13 cards)
what are the 3 types of heat transfer?
conduction, convection, radiation
which method of heat transfer uses electromagnetic waves ?
radiation
fill in the blanks : all objects continuously —- and —— this type of radiation
emit and absorb
how does temperature difference affect the rate of heat transfer?
the bigger the difference between the 2 temperature the faster the heat transfer.
the type of heat transfer that takes place best through solids is called:
conduction
define this type of heat transfer (conduction)
the transfer of energy from the more energetic particles to the less energetic particles of a substance due to the interaction of these particles
describe how heat is transferred through conduction
through direct contact, where thermal energy is transferred from a hotter region to a cooler region within a substance or between two substances in contact.
Define convection
the rising motion of warmer areas of a liquid or gas, and the sinking motion of cooler areas of liquid or gas, sometimes forming a complete cycle.
describe how convection heats water
by creating currents as heated water rises and cooler water sinks
why does convection not occur in solids?
in solids, the particles cant move as much as liquids and gases so there is not space for convection to happen
a blank surface is good at blanking and at blanking infared radiation
dark, absorbing,emitting
a blank and blank surface is good at blanking infared radiation but is a poor blanker/blanker
…light,shiny,reflecting,absorber/emitter
what is the difference between thermal energy and temprature
temperature is a measurement of how hot or cold something is, while thermal energy is the total amount of energy within an object due to the motion of its particles
