State and explain the 'Law of Conservation of Mass'.

State the explain the law of conservation of mass. Describe an activity to chek the validity of the law .

(a) State and explain the law of conservation of energy with an example ? (b) Explain how, the total energy a swinging pendulum at any instant of time remains conserved. Illustrate your answer with the help of a labelled diagram.

State and explain the law of gravitation.

(a) State the various postulates of Dalton's atomic theory of matter. (b) Which postulate of Dalton's atomic theory can explain the law of conservation of mass ? (c ) Which postulate of Dalton's atomic theory can explain the law of constant proportions ?

State and explain the Law of Mass Action.

State and explain the principle of conservation of linear momentum. Establish the same using Newton's third law of motion.