In engineering design, something that limits the solution to a problem.

In engineering design, the goals and the desired features of the solution, Plural of criterion.

A minimum requirement for how the design must function.

Any material that is resistant to the flow of thermal energy or electrical energy.

A material that is used to slow down of prevent the flow of thermal energy or electrical energy through it.

An object that supports the transfer of thermal energy or electrical energy.

To take in or to soak up.

The process of energy or matter entering a material but not exiting the material.

A property of waves wherein the wave bounces off an object.

Energy that comes from the sun.

The act of energy passing through a medium or vacuum.

The transfer of thermal energy by the movement of fluids of different temperatures.

A substance, such as a liquid or gas, that can flow.

The emission of radiant energy.