Calculate the capillary effect in mm in a glass tube of 2mm diameter, when immersed in (1)water, (2)mercury. The temperature of the liquid is 25°C and the values of surface tensions of water and mercury at 25°C in contact with air is 0.0755 and 0.59N/m respectively. The angle of contact for water is 0° and 130° for mercury . Take the density of water 1000 kg/m3 , specific gravity of mercury is 13.6. The capillary effect of water in mm is equal to= The capillary effect of mercury in mm is equal to=

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.