P2-Energy Transfer By Conduction Flashcards
What is conduction?
The process where vibrating particles transfer energy to neighbouring particles
What is thermal conductivity?
A measure of how quickly energy is transferred through a material by conduction
How can you test sheets of materials as insulators?
Use different materials to insulate identical cans of hot water. Use a thermometer to measure the water temperature after a fixed time
What is convection?
Where energetic particles move away from hotter to cooler regions
What does the energy transfer through a material per second depend on?
-The temperature difference across the material
-The thickness of the material
-The thermal conductivity of the material
The higher the temperature of an object, the ________ infrared radiation it emits
More
A body at a constant temperature emits infrared radiation __________________ it absorbs it
At the same rate as
What is a perfect black body?
An object that aborbs all the radiation that hits it
What is black body radiation?
The radiation emitted by a perfect black body
