Advertisements
Advertisements
प्रश्न
Explain the following
A hollow glass sphere which floats with its entire volume submerged in water at 4°C, sinks when water is heated above 4°C.
उत्तर
On heating water above 4°C, the density of water decreases. As a result, the upthrust acting due to water on hollow glass sphere also decreases, which causes it to sink.
APPEARS IN
संबंधित प्रश्न
Give reason of Water pipes burst in severe winter.
How does the anomalous expansion of water help aquatic organisms in cold climates?
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.
What do you understand by the anomalous expansion of water?
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?
Give reasons for the following:
Even when the water in the lakes is frozen, fish can survive.
What will be the approximate temperature of water in the lake shown in the following diagram?
(i) At X, and
(ii) At Y?
In a region with a cold climate the aquatic animals can survive at 4 °C, because _______.
_______ apparatus is used to study the anomalous behaviour of water.
