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प्रश्न
What are land and sea breezes? Explain with the help of a labeled diagram.
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उत्तर
The cold air that blows from the land towards the sea during night, is called a land breeze. The cold air that blows from the sea towards the land during the day is known as the sea breeze. These breezes are examples of a natural convection current.

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संबंधित प्रश्न
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:
In cold regions in winter, the rocks crack due to anomalous expansion of water.
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.
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?
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer just in contact with ice?
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?

_______ apparatus is used to study the anomalous behaviour of water.
Draw a neat and labelled diagram of Hope’s apparatus.
