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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 of Ice floats on water.
Observe the following graph. Considering the change in volume of water as its temperature is raised from 0°C, discuss the difference in the behaviour of water and other substances. What is this behaviour of water called?

Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
Observe the given graph and answer the following questions:

- Name the process represented in the figure.
- At what temperature does this process take place?
_______ apparatus is used to study the anomalous behaviour of water.
Write scientific reason.
Fish can survive even in frozen ponds in cold regions.
