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प्रश्न
Explain, why are the exposed water pipes lagged with straw during severe winter?
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उत्तर
Water freezes at sub-zero temperature and in doing so expands (anomalous behaviour of water). So exposed water pipes during severe winter are lagged with a straw so as to provide sufficient space for the expansion of freezing water.
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संबंधित प्रश्न
Give reason for Sea water does not freeze at 0°C.
What is the role of the anomalous behaviour of water in preserving aquatic life in regions of cold climate?
Calculate the time required to heat 20 kg of water from 10°C to 35°C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000 J kg−1 K−1.
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.
What do you mean by the anomalous expansion of water?
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
Density of water is maximum at :
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer at the bottom of the pond?
Why does a thick glass tumbler crack when very hot water is poured in it?
