Sir I have a doubt in a similar question that was asked in jee main. In that question if i just conserve initial and final energy i dont get the right ans.But if i do it with integration i get it right.The ques is.............Assume that a drop of liqd evaporates by decrease in its surf energy so that its temp remains const.what shud be the min radius of drop for this to be possible. (T--surf tension;rho- density of liqd;L---latent heat of vap)....ans...2T/rho*L.... (PLEASE TELL ME WHY THE ABOVE SOLVED PROB WAS NOT DONE BY INTEGRATION).....Thnxs and sorry for the long ques.
8 years ago
by
Mohak Sharma