Question

why does a substance contact on cooling ?​

Answer 1

Explanation:

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy (heat) between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species, either cold or hot, to achieve heat transfer. While these mechanisms have distinct characteristics, they often occur simultaneously in the same system.

Answer 2

Answer:

When it is cold the kinetic energy decreases,so the atoms takes up less space and the material contracts.

Explanation: