dude, this is easy, are you trying to fool me or something :P... trying to fool a fool, ehh.. ok taini let me try, i assume you mean 0 not "O", and i again assume you mean it in F, coz thats what we use in this strange land.. so lets appoarch ur problem, u mean twice as cold as today, so that is 1/2 as warm tommorrow correct..so that is -16 F..and yes F is measuring heat..and 0 degree means the absence of heat... plus i want to be scientifically correct, so what i will do here is convert F to Kelvin, for which the formula is (Degree F)+459.67 = kelvin.. and for u.. If you set out to fail, and succeed, what have you done?..really think abt it man..:) by solving that u will get the answer..i think u can do that much of wrk cant u