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प्रश्न
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उत्तर
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संबंधित प्रश्न
Give reasons:
Water pipes burst in severe winters.
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.
What do you mean by the anomalous expansion of water?
At what temperature is the density of water is maximum? State its value.
Study the following diagrams and write down your observations.
What is the criterion of choosing the two metals for a bimetal strip?
In cold regions, in winter the pipes for water supply break.
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The density of water is maximum at | (a) 0°C |
| (b) 4°C | |
| (c) 100°C |
