Name the principal on which a rocket works.

Name the principle on which it works.

Name the principle on which a soundboard works.

Name the principle on which the enzymes work.

Name the principle which is used in rocket propulsion.

Answer the following questions : State the principal on which the working of an electric motor is based.

Answer the following questions : State the principal on which the working of an electric generator is based.

Name and state the principal on which the hydraulic brakes of a car works.

What is the principle of working of a rocket ?