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while measuring th thermal conductivity of water the upper part is kept hot,why is this so?
is this so because heat conduction is easier downwards.
is this so because heat conduction is easier downwards.
It is to prevent convection from happening. If convection happens, you will not be able to measure the conduction. You cannot heat from the bottom without causing convection. Gravity will not make it easier for conduction to happen. If you could prevent convection with some other orientation, the conduction would be the same. But you can't eliminate convection with another orientation.nishant said:I am still not able to get the answer totally correctly.BY maintaing the upper layer hot our main aim is to stop convection or is it the fact that if we maintain the upper layer hot we will be able to conduct heat downwards quite easily?