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प्रश्न
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उत्तर
The cold air that blows from the land towards the sea during the 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.
Natural convection currents
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संबंधित प्रश्न
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.
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.
Draw a graph between volume and temperature, when 5 cm3 of ice at -10°C is heated to form water at +10°C.
Explain why do vegetables and fruits get damaged during severe frost?
What are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?
What are land and sea breezes? Explain with the help of a labeled diagram.
The following figure shows a metal cylinder, containing boiling water. One half side A is polished and another half, B is painted black. Two thin metal sheets X and Y are painted black and have one rubber stopper fixed with wax on each sheet. These sheets are equidistant from the boiling water (container A, B) as shown in the diagram. What would you expect to happen after a few minutes? Give a reason for your answer.
Study the following diagrams and write down your observations.
Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
