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संबंधित प्रश्न
Answer the following:
On what basis and how will you determine whether air is saturated with vapour or not?
On a winter day the temperature of the tap water is 20°C whereas the room temperature is 5°C. Water is stored in a tank of capacity 0.5 m3 for household use. If it were possible to use the heat liberated by the water to lift a 10 kg mass vertically, how high can it be lifted as the water comes to the room temperature? Take g = 10 m s−2.
Consider the situation of the previous problem. Assume that the temperature of the water at the bottom of the lake remains constant at 4°C as the ice forms on the surface (the heat required to maintain the temperature of the bottom layer may come from the bed of the lake). The depth of the lake is 1.0 m. Show that the thickness of the ice formed attains a steady state maximum value. Find this value. The thermal conductivity of water = 0.50 W m−1°C−1. Take other relevant data from the previous problem.
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
Density of water is maximum at :
What do you understand by the anomalous expansion of water?
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer just in contact with ice?
What are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?
Write scientific reason.
Placing a plastic bottle filled with water in the freezing compartment in the freezer can cause the bottle to explode.
