click below
click below
Normal Size Small Size show me how
Heat Transfer
Conduction Convection Radiation
Question | Answer |
---|---|
What is another word for thermal in, for example, thermal conduction? | Heat |
Which method of thermal transfer works best in solids? | conduction |
What have metals got that makes them better at thermal conduction? | free (or delocalised) electrons |
Why are liquids and gases both called fluids? | They can flow. |
Which method of thermal transfer works best in fluids? | convection |
What is another name for thermal or heat radiation? | Infra Red |
Which type of thermal transfer is the only one that works in a vacuum? | radiation |
What is the opposite of a conductor? | insulator |
One word for bouncing radiation off a surface. | reflection (or reflecting) |
One word for soaking up thermal radiation. | absorbing (or absorption) |
One word for hot things giving off thermal radiation. | emitting (or emission) |
Best kind of surface for reflecting: | shiny (glossy) and light |
Best kind of surface for absorbing: | dark and dull (matt) |
Best kind of surface for emitting: | dark and dull (matt) |
Best insulator in the universe and why: | vacuum (no particles) |
Best insulator between free air and trapped air and why: | trapped air (trapping it stops convection currents) |
Kind of window that uses trapped air for insulation: | double glazing |
In a solid that is heated atoms and molecules.. | .. vibrate more, and get further apart. |
In a fluid that is heated atoms and molecules.. | .. move faster and get further apart. |
Density equals | mass divided by volume |
If its particles get further apart a fluid's density gets | less (smaller, lower) |