A cool box made of a material, having Thermal Conductivity of 0.22 W/m.°C has a total area of 3.9 m² and its walls have an average thickness of 7cm. The box contains ice and glass-bottled beverages at the freezing point of water. The inside part of the box is kept cold by melting ice. How much ice (in kg) melts in 2hours if the icebox is kept in a room at 120°F?

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Properties of Fluids

The term fluid represents a type of substance that can easily change its shape under any external pressure/force and can flow. Fluids can acquire any shape in which it is stored and can resist normal stresses but cannot resist shear stress in rest condition. Whenever external shear stress is applied to fluids, it starts to flow. The fluids may be liquid or gas. Example- water, air, etc.