New posts in Definition

What's the difference between Hard X-rays and Gamma-rays?

What is meant by multiplication in physics such as $s = v·t$?

Do Newtonian mechanics and thermodynamics have different definitions of internal energy?

Why is this a non-holonomic constraint?

What is a delta potential?

Does the fact that there are two different mathematical definitions of entropy imply there are two different kinds of entropy?

Equivalence of two definitions of proper time in special relativity

What is the difference between a translation and a Galilean transformation?

Equivalent definitions of total angular momentum

How can I explain what a kilogram is using Planck's constant?