Does a physical change make the substance that undergoes it a different substance

When a substance undergoes a physical change, the atoms that make up that substance are not changed or rearranged. Chemical properties are the way substances react with others to form new substances. ... When substances undergo chemical change, the mass of the reactants will be the same as the mass of the products.

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

while cooking a piece of 1/2 pound beef steak, a cast iron pan (2.4kg in weight) was heated 260 celsius.