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प्रश्न
Why does a thick glass tumbler crack when very hot water is poured in it?
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उत्तर
Why does a thick glass tumbler crack when very hot water is poured in it?
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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.
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?
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.
What do you mean by the anomalous expansion of water?
Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C.
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.
When the temperature of water decreases below 4 °C it’s volume _______.
_______ apparatus is used to study the anomalous behaviour of water.
In cold regions, in winter the pipes for water supply break.
