20. Heat and Temperature

In the context of heat transfer, in which direction does thermal energy naturally flow between two objects at different temperatures ($T_1$ and $T_2$, where $T_1>T_2$)?

Boiling an egg in water is an example of which type of heat transfer?

The movement of a hot fluid from one place to another is an example of which method of heat transfer?

Which term describes the transfer of heat due to direct contact between particles of matter?

Which of the following best describes how heat transfer by $\mathrm{radiation}$ differs from heat transfer by $\mathrm{convection}$ or $\mathrm{conduction}$?

Which of the following lists correctly identifies the three main mechanisms by which thermal energy can be transferred?

Which method of heat transfer does not require a medium or physical contact to transfer heat?

When food is heated in a microwave oven, which type of heat transfer is primarily responsible for the heating process?

Which process describes the transfer of energy through the bulk movement of a fluid or gas?

When the Sun warms the sand on a beach, which type of heat transfer is primarily responsible for this process?

When cheetahs stay in the shade to avoid heat from the $\mathrm{Sun}$, which type of heat transfer are they primarily avoiding?

Which of the following lists correctly identifies the three primary forms of heat transfer?

Which of the following lists correctly identifies the three primary mechanisms by which $\mathrm{heat}$ can be transferred?

In conduction, things must $\_\_\_\_\_\_\_\_\_\_$ for heat to transfer using this type of transfer.