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संबंधित प्रश्न
Water is used as a cooling agent.
Give reason of Ice floats on water.
A calorimeter contains 50 g of water at 50°C. The temperature falls to 45°C in 10 minutes. When the calorimeter contains 100 g of water at 50°C, it takes 18 minutes for the temperature to become 45°C. Find the water equivalent of the calorimeter.
Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C.
Density of water is maximum at :
Explain why do vegetables and fruits get damaged during severe frost?
In cold countries, the water pipes are covered with poor conductors. Why?
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.
When the temperature of water decreases below 4 °C it’s volume _______.
