There is, yes, the absence of heat, that our brain tries to compensate for goose bumps and the erects. The particles and their movement explain everything.
Never say that it is “cold”. The cold does not exist (According to physics) and therefore it is impossible to “have it.”
Although it is a feeling that we all feel sometimes, in scientific terms, cold is not an entity of its own – it is not a form of measurable energy. What we feel exactly is absence of heatthe energy associated with the movement of the particles of the bodies, or the decrease in the thermal energy of our body.
When we feel cold, what happens is that we lose heat from our body to the environment around us. Heat is a form of energy that transfers from a warmer body to a colder body, and this transfer is what makes us feel uncomfortable when exposed to lower temperatures.
The physical explanation behind this sensation is related to the particle movementas explained by. When something is hot, your particles move quickly, and that’s what we feel like heat. On the other hand, when something is cold, the particles move more slowly, and this makes the temperature of an object or environment perceived as cold. But it is important to highlight that the cold itself cannot be added to a body – what really happens is that heat is removed from a system.
A clear example of this dynamic can be observed in cooling devices, such as the fridge and the freezer. Although these devices are associated with “cold,” which they do, in fact, is to remove heat from food and expel it abroad. This process demonstrates that cold is not something generated directly, but a consequence of heat removal.
In addition, the lowest known temperature, the zero absolutoIt is the point where particles do not have any thermal energy, that is, they do not move. In this state, the absence of heat is maximum, but still, we cannot speak of “cold”, because it remains a subjective sensation and not a measurable physical grandeur.
Although physics explains that cold is not a quantified quantity, our perception is very real. Our body has sensors that detect heat loss and, when this happens, the brain interprets as a uncomfortable sensation. To react, the body tries to compensate for this loss of heat through mechanisms such as tremors, the contraction of blood vessels and the erection of the hairall in order to conserve the internal heat.
