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प्रश्न
Water is used as a cooling agent.
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उत्तर
Water has high specific heat. Water neither heats up nor cools down quickly. This property makes water an excellent cooling agent.
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संबंधित प्रश्न
Explain the following:
How can you relate the formation of water droplets on the outer surface of a bottle taken out of refrigerator with formation of dew?
Consider the situation of the previous problem. Assume that the temperature of the water at the bottom of the lake remains constant at 4°C as the ice forms on the surface (the heat required to maintain the temperature of the bottom layer may come from the bed of the lake). The depth of the lake is 1.0 m. Show that the thickness of the ice formed attains a steady state maximum value. Find this value. The thermal conductivity of water = 0.50 W m−1°C−1. Take other relevant data from the previous problem.
How do fishes survive in frozen lakes?
Explain, why does a glass bottle completely filled with water and tightly capped burst when placed in a freezer?
Explain why do vegetables and fruits get damaged during severe frost?
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.
