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प्रश्न
Explain, why does a glass bottle completely filled with water and tightly capped burst when placed in a freezer?
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उत्तर
A glass bottle completely filled with water and closed tightly is likely to burst in the freezer of refrigerator because water changes into ice and its volume increases. Since water when cooled from 4°C to 0°C expands. Thus, exerts large pressure and glass bottle bursts.
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संबंधित प्रश्न
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 are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?
Study the following diagrams and write down your observations.
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
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.
Draw a neat and labelled diagram of Hope’s apparatus.
