State if each of the following statements is true or false . Give reasons for your answer .
Total energy of a system is always conserved , no matter what internal and external forces on the body are present .

True / False type questions : Total energy of a system is always conserved, no matter what internal and external forces on the body are present.

Which of the following are statements and which are not ? Give reasons for your answers. Who are you ?

Which of the following are statements and which are not ? Give reasons for your answers. The sun is a star.

State if each of the following statements is true or false. Give reasons for your answer. a) In an elastic collision of two bodies, the momentum and energy of each body is conserved. b)Total energy of a systm is always conserved,no matter what internal and external forces on the body are present. Work done in the motion of a body over a closed loop is zero for every force in nature. d) In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the sytem.

Which of the following statements are true? Give reason to support your answer.Every set has a proper subset.