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प्रश्न
How do fishes survive in frozen lakes?
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उत्तर
Fishes survive in pond even when the atmospheric temperature is below 0°C. It is because of anomalous expansion of water. When the temperature falls below 0°C water changes into ice and rises to the top and ice being poor conductor of heat helps to keep water below it at 4°C and fish can live in pond water.
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संबंधित प्रश्न
The amount of water vapour in air is determined in terms of its ______.
What is the role of the anomalous behaviour of water in preserving aquatic life in regions of cold climate?
A 50 kg man is running at a speed of 18 km h−1. If all the kinetic energy of the man can be used to increase the temperature of water from 20°C to 30°C, how much water can be heated with this energy?
What do you mean by the anomalous expansion of water?
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Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
A graph between the volume and temperature of water is shown. Explain the anomalous behaviour of water.
