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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 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:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of the refrigerator with the formation of dew?
1 kg of ice at 0°C is mixed with 1 kg of steam at 100°C. What will be the composition of the system when thermal equilibrium is reached? Latent heat of fusion of ice = 3.36 × 103 J kg−1 and latent heat of vaporization of water = 2.26 × 106 J kg−1.
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.
Density of water is maximum at :
What do you understand by the anomalous expansion of water?
The following diagrams illustrate three situations involving thermometers which are labeled A, Band C. In each situation the thermometers indicate different readings.
(i) What do you expect the approximate reading of the thermometer B and C would be? Give a reason for your answer.
(ii) How would the readings of A and B help you in calibrating a thermometer?
Observe the given graph and answer the following questions:
- Name the process represented in the figure.
- At what temperature does this process take place?
Write scientific reason.
Fish can survive even in frozen ponds in cold regions.
Draw a neat and labelled diagram of Hope’s apparatus.
Name the following diagram appropriately.
