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प्रश्न
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उत्तर
Fill a round bottom flask with a coloured liquid up to the brim. Fit it with a one holed cork and pass a narrow glass tube through it. Mark the level of the liquid in the glass tube. Place the flask in a water bath and heat the bath.
You will see that the level of liquid water rises in the glass tube. This is due to the expansion of the liquid on heating.
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संबंधित प्रश्न
Explain the following:
In cold regions in winter, the rocks crack due to anomalous expansion of water.
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?
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
Explain why do vegetables and fruits get damaged during severe frost?
A deep pond of water has its top layer frozen. What will be the likely temperature of water layer at the bottom of the pond?
The following figure shows a metal cylinder, containing boiling water. One half side A is polished and another half, B is painted black. Two thin metal sheets X and Y are painted black and have one rubber stopper fixed with wax on each sheet. These sheets are equidistant from the boiling water (container A, B) as shown in the diagram. What would you expect to happen after a few minutes? Give a reason for your answer.
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
Write scientific reason.
Fish can survive even in frozen ponds in cold regions.
Name the following diagram appropriately.
