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प्रश्न
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उत्तर
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संबंधित प्रश्न
Water is used as a cooling agent.
Give reason of Ice floats on water.
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.
At what temperature is the density of water is maximum? State its value.
Density of water is maximum at :
What do you understand by the anomalous expansion of water?
Write the name.
The instrument used to study anomalous behaviour of water.
Write scientific reason.
Fish can survive even in frozen ponds in cold regions.
Observe the given picture and answer the following questions.
- Which property do you understand in this picture?
- What is the temperature of the water at the surface?
- What is the temperature below the layer of ice on the surface?
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The density of water is maximum at | (a) 0°C |
| (b) 4°C | |
| (c) 100°C |
