Work done by an external non-conservative force is equal to change in the mechanical energy of the system.Final M. E - Initial M. E = WIf an external force does no work, then mechanical energy will be...
1.What is light? Ans:Light is a form energy, which gives sensation ofof sig. 2.What is transparent medium? Ans:A medium through which light can propagate easily. Eg-glass, bottle, bulb etc 3.What...