Thermal energy is a term sometimes used to refer to the internal energy present in a system in a state of thermodynamic equilibrium by virtue of its temperature.

Infrared radiation (IR) is a region of the electromagnetic radiation spectrum where wavelengths range from about 700 nanometers (nm) to 1 millimeter (mm).

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Infrared radiation is an electromagnetic spectrum that exists between visible light and radio waves.

A robot is an automatic mechanical device often resembling a human or animal.

A hot dog (also spelled hotdog) is a cooked sausage, traditionally grilled or steamed and served in a sliced bun as a sandwich.