Question

Question #508b6

Answer 1

Here both conduction and convection work.

Explanation:

The heated metal heats up the layer of water directly in contact with it by conduction. This heated water in turn heats up the rest of the water by convection .
conduction occurs when two bodies are in thermal contact but the actual mass transfer does not happen.
convection occurs only in fluids where heating is done by actual mass transfer.
No thermal conductivity does not depend on the density of the material.It depends on the following factors