8K Flashcards
What is heat?
How hot or cold something is
If something is a bigger mass, will it have less or more heat?
More
If something has a smaller mass what does it have less of?
Heat and particles
How is he transmitted?
Particles vibrate
From passes to slowest will order is the heat conductivity for copper, aluminium, brass and steel
Copper aluminium brass and steel
Why is copper the most conductive?
It is very tightly packed particles and has three floating electrons to knock the particles.
Explain the Sankey diagram and draw one
Energy goes in 100%, the hour points down for the wasted energy and go straight ahead for useful energy
Why does a flask have a vacuum?
There are no particles and vacuum to vibrate and transmit the heat
Why does a flask have a plastic cap?
Because plastic is an insulator
Why does a flask have a silver coated surface?
To reflect the infrared radiation that still gets through the vacuum
When particles vibrate what sort of energy is it?
Kinetic
