Advertisements
Advertisements
Question
At what temperature is the density of water is maximum? State its value.
Solution
Density of water is maximum at 4°C. Its value is 1000 kgm-3.
APPEARS IN
RELATED QUESTIONS
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.
Draw a graph to show the variation in density of water with temperature in the range from 0°C to 10°C.
Explain the following
Fishes survive in ponds even when the atmospheric temperature is well below 0°C.
What are hot spots? How can you extract energy from a hot spot, if it does not come in contact with underground water?
In cold countries, the water pipes are covered with poor conductors. Why?
The following diagrams illustrate three situations involving thermometers which are labeled A, Band C. In each situation the thermometers indicate different readings.
(i) What do you expect the approximate reading of the thermometer B and C would be? Give a reason for your answer.
(ii) How would the readings of A and B help you in calibrating a thermometer?
In cold regions, in winter the pipes for water supply break.
Name the following diagram appropriately.
Match the columns:
| Column ‘A’ | Column ‘B’ |
| The density of water is maximum at | (a) 0°C |
| (b) 4°C | |
| (c) 100°C |
