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प्रश्न
Explain, why are soft drink bottles not completely filled?
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उत्तर
On lowering the temperature below 4°C, water expands due to its anomalous behaviour. So, if soft drink bottles are completely filled, then they may burst and cause accident. As a result, soft drink bottles are not completely filled.
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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.
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.
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
What do you understand by the anomalous expansion of water?
What are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?
Write scientific reason.
Fish can survive even in frozen ponds in cold regions.
Write scientific reason.
Placing a plastic bottle filled with water in the freezing compartment in the freezer can cause the bottle to explode.
