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

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.

True/False type question. Amphetamines are stimulants.

What is meant by a particle, a system and internal and external Force?

Can kinetic energy of a system be increased without applying any external force on the system?

Which is true for Internal energy of system is ?

True / False type questions : Work done by a body against friction results in a loss of its potential energy.

True/False Type Question. The structural gene in prokaryotes is polyclstronic.

True/False type question. Ascariasis is a communicable disease.