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प्रश्न
Give reasons:
Water pipes burst in severe winters.
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उत्तर
During severe winters when the temperature starts falling below 4°C, water in pipelines expands (due to the property of anomalous expansion of water), and it exerts large pressure on the pipes, causing them to burst.
संबंधित प्रश्न
Give reason for Sea water does not freeze at 0°C.
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?
On what basis and how will you determine whether air is saturated with vapour or not?
A calorimeter contains 50 g of water at 50°C. The temperature falls to 45°C in 10 minutes. When the calorimeter contains 100 g of water at 50°C, it takes 18 minutes for the temperature to become 45°C. Find the water equivalent of the calorimeter.
Explain the following
A hollow glass sphere which floats with its entire volume submerged in water at 4°C, sinks when water is heated above 4°C.
In cold countries, the water pipes are covered with poor conductors. Why?
Why does a thick glass tumbler crack when very hot water is poured in it?
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.
Draw a neat and labelled diagram of Hope’s apparatus.
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?
A graph between the volume and temperature of water is shown. Explain the anomalous behaviour of water.
