Write at least name of five devices which work under the principles of physics.

What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%

The process of a material going through a change of state from a gas to a liquid

An object is placed in front of a concave mirror between the pole and the focus of the mirror, what is the nature of the image formed by the mirror