@@introductiontomaterialsscience yes sir, it will be helpful. btw, i have enjoyed watching all your lectures. Currently i am pursuing Mtech from NIT Kkr & they have been very helpful. Thanks a lot sir for replying.
Sir can you please let me know, which metal stays cold longer at room temperature once cooled below zero ....Aluminium or steel or cooper ....for example if all the three are cooled together which will get warm the fastest ??
Difficult question. Let me try. Amount of heat required to raise the temperature by 1 degree is specific heat. Specific heats of Cu, steel and Al are 380, 500 and 920 Jkg^-1K^-1. So Al will require maximum heat to raise its temperature by a given degrees. So if we provide heat at a constant rate then Al will heat up most slowly. But I suppose thermal conductivities will also play some role.
@@introductiontomaterialsscience sir thank you.....I tried a simple experiment at home... Placed three metals in fridge for two hours... And later let them come to room temperature... Steel remained cold much longer then copper and aluminum....
@@irfanghazanfar28 thermal diffusivity plays more important role than thermal conductivity in this analysis Its questions related to unsteady heat transfer ,u can check examples like this and easily solve with equation based on lumped-parameter
