What is the main way that heat energy travels to the interior of solid food? In what two ways does it travel to the interior of a liquid? Provide an example of when it is desirable to slow down heat...

What is the main way that heat energy travels to the interior of solid food? In what two ways does it travel to the interior of a liquid?

Provide an example of when it is desirable to slow down heat transfer. Explain one way (besides reducing the heat!) that it can be slowed.