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The amount of water vapour in air is determined in terms of its ______.
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.
Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C.
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
In cold regions, in winter the pipes for water supply break.
