The process of heating air in a room with a heating battery is explained by such a physical phenomenon as convection. Convection is the transfer of internal energy using a liquid or gas. So, hot batteries heat up air (gas), which, having a lower density, rises up, and in its place is cold air. Therefore, heating batteries in rooms are mounted from below.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.