Category: Thermodynamics

According to the Department of Energy, our bodies and modern technology use several processes to dissipate excess heat, but they all boil down to three main types of cooling: active, passive, and thermoelectric. These methods are used in everything from air conditioners to computer processors to keep systems running efficiently and safely.

According to the laws of physics, a perfect 'black body' absorbs all incident electromagnetic radiation, and therefore, the most heat possible. In contrast, the question of which body absorbs most of the heat in a biological sense is far more complex, involving internal organ activity, body composition, and external environmental factors,.

Fundamentally, all natural processes are irreversible to some degree, a consequence of the Second Law of Thermodynamics. Understanding **what makes a change irreversible** reveals fundamental truths about the universe and the limitations of physical and chemical transformations.

According to physics, the average kinetic energy of the molecules in a substance is directly proportional to its temperature. This fundamental concept helps answer the question: What is the degree of hotness of a body called? It is, simply put, temperature.

In Finland, the home of the sauna, pouring water on the hot rocks is a cherished tradition known as *löyly*. But **does water make a sauna hotter**, or is it just an illusion? The answer lies in the principles of thermodynamics and how our bodies perceive heat, which can be dramatically different from reality.