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प्रश्न
Study the following diagrams and write down your observations.
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उत्तर
In the diagram, it is clear that the ice will melt faster in the flask than in the test tube because water is a bad conductor of heat and the transfer of heat in liquid through convection is from bottom to top.
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संबंधित प्रश्न
Explain the following:
In cold regions in winter, the rocks crack due to anomalous expansion of water.
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.
On a winter day the temperature of the tap water is 20°C whereas the room temperature is 5°C. Water is stored in a tank of capacity 0.5 m3 for household use. If it were possible to use the heat liberated by the water to lift a 10 kg mass vertically, how high can it be lifted as the water comes to the room temperature? Take g = 10 m s−2.
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?
At what temperature is the density of water is maximum? State its value.
What do you understand by the anomalous expansion of water?
Explain, why are the exposed water pipes lagged with straw during severe winter?
While studying anomalous behaviour of water in Hope’s apparatus, the upper temperature of the thermometer : 0 °C : : lower temperature of the thermometer : _______
Write the name.
The instrument used to study anomalous behaviour of water.
