We need to eat more on the basis of heat transfer and the first law of thermodynamics as more energy is lost by the body in colder weather and the need to eat increases so as to maintain a constant weight.
Heat is a conception that's necessary to grasp in numerous engineering fields. It's notably relevant for civil, mechanical and chemical engineers as heat transfer plays a key role in material choice, machinery potency and reaction dynamics, respectively.
The first law of thermodynamics is very important as it is an expression of the principle of conservation of energy. It means that energy is transformed but cannot be created or destroyed. It;s examples include melting of an ice cube, sweating in a crowded room, etc.
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