2. A large number of water drops each of radius r combine to have a drop of radius R. If the surface tension is T and the mechanical equivalent of heat is J, then the rise in temperature will be (a) 2T/rJ (b) 3T/RJ (c) 3T/J[(1/R )-(1/R)] (d) 2T/J[(1/r)-(1/R)] Ans. c (30) Read More
