From: utzoo!decvax!duke!harpo!floyd!peri!sbcs!debray Newsgroups: net.physics Title: Re: physics of teabags Article-I.D.: sbcs.187 Posted: Fri Dec 24 14:13:36 1982 Received: Mon Dec 27 02:49:33 1982 References: sri-unix.4885 With regard to the question of when to add cold milk to hot tea so as to have the tea as hot as possible after the phone has been answered : Obviously, one should add the milk BEFORE going to answer the phone, since heat loss is proportional to the difference in temperature between the cup of tea and the surroundings. I mean the Rate of heat loss. Saumya Debray