Hi this is my first post here. I am attempting to calculate how long it takes for a soda can(355ml) to change from Current room temperature(75F), to say 38F, however the refrigerator or ambient temperature in this case is 35F. I was given a corollary from a friend, but the values I get in return are way off. t = pV/hA * LN[ (T1 - Ta)/(T2 - Ta) ] t= [(988.9 kg/m3 )(0.000355 m3 )]/[(255W/m2K)(.0277m2)] * LN[ (75 - 35)/(38 - 35)] I attempted to use metric for all the units. p=density V=Volume A=surface area h= convection coefficient of water or the aluminum can? T1 and T2 are the initial and final temperatures of the drink. Ta is the ambient temperature. However I plug-in the equation it seems to not output realistic data. I'll get something like .5 seconds depending on what variables I plug in/manipulate. Is my equation incorrect or my units incorrect? Also are their any other better equations to do this with? This is driving me mad, please help. Ideally I need to figure out a working base equation, as well as know what each unit is.