Steam at 100o C is passed into 20 g of water at 10o C. When water acquires a temperature of 80o C, the mass of water present will be:
[Take specific heat of water = 1 cal g-1 oC -1 and latent heat of steam = 540 cal g-1]
Copper of fixed volume 'V' is drawn into wire of length 'l'. When this wire is subjected to a constant force'F', the extension produced in the wire is . Which of the following graphs is a straight line?
A certain number of spherical drops of a liquid of radius 'r' coalesce to form a single drop of radius 'R' and volume 'V'. If 'T' is the surface tension of the liquid, then:
Energy is neither released nor absorbed.