P.2 - Energy Transfer by Heating
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15 Terms
What is conduction?
how energy is transferred from a hot body to a cooler one
What is thermal conductivity?
the rate of energy transfer by conduction
What is a resolution?
the smallest increment on a measurement device
What is a random error?
results are spread out, and varying in an unpredictable way
What is a systematic error?
the reading is out by the same amount each time
What affects the amount of radiation radiated?
temperature
What is a perfect black body?
an object that absorbs all radiation incident on it
(doesn’t reflect or transmit any radiation)
What does the intensity and wavelength distribution of any emission depend on?
temperature of the body
What is intensity?
the power transferred per unit area
What happens in global warming?
sunlight is absorbed by the atmosphere
The ground becomes warner, and emits longer wavelength infrared radiation
CO2 absorb the infrared and re-emits it back to the ground
the earths temperature rises
What is the specific heat capacity?
the amount of energy required to raise the temperature on 1kg of a substance 1oC
What is the theta symbol
θ
What is the delta symbol?
△
When do you use theta?
temperature
When do you use delta?
change in energy
