2. First principle
Historically, the first principle of thermodynamics was called the equivalence principle, because it stipulated the equivalence of two forms of energy: mechanical and thermal. More generally, this principle is still that of energy conservation. In rational mechanics, for example, this principle is used in a particular form. Thus, if a moving body is subject only to a force field derived from a potential, the sum of its potential energy and kinetic energy is constant. Overall energy is conserved.
2.1 Equivalence principle
Statement of the equivalence principle: if, during a cyclic transformation, any system can only exchange work and heat with the external environment, the sum of work and heat received by the system is zero....
Exclusive to subscribers. 97% yet to be discovered!
Already subscribed? Log in!
First principle
Study of closed systems
Article included in this offer
"Physics of energy"
(
72 articles
)
Updated and enriched with articles validated by our scientific committees
A set of exclusive tools to complement the resources
