Heat Transfer
In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is

26.8
40.5
34.4
25

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Heat Transfer
If Prandtl number is greater than the Schmidt number, then the

none of the listed here
thermal & concentration boundary layers are of equal thickness
concentration boundary layer lies inside the thermal boundary layer
thermal boundary layer lies inside the concentration boundary layer

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