Advertisements
Advertisements
प्रश्न
How do fishes survive in frozen lakes?
Advertisements
उत्तर
Fishes survive in pond even when the atmospheric temperature is below 0°C. It is because of anomalous expansion of water. When the temperature falls below 0°C water changes into ice and rises to the top and ice being poor conductor of heat helps to keep water below it at 4°C and fish can live in pond water.
APPEARS IN
संबंधित प्रश्न
Give reasons:
Water pipes burst in severe winters.
Observe the following graph. Considering the change in volume of water as its temperature is raised from 0°C, discuss the difference in the behaviour of water and other substances. What is this behaviour of water called?
Calculate the time required to heat 20 kg of water from 10°C to 35°C using an immersion heater rated 1000 W. Assume that 80% of the power input is used to heat the water. Specific heat capacity of water = 42000 J kg−1 K−1.
Explain, why are soft drink bottles not completely filled?
What is the criterion of choosing the two metals for a bimetal strip?
_______ apparatus is used to study the anomalous behaviour of water.
