QuestionPhysics / water
At atmospheric pressure, the density of water is maximum at a temperature of:
- (a) 0 °C
- (b) 4 °C
- (c) –4 °C
- (d) 1 °C
Answer: (b) 4 °C
Water has maximum density at 4 °C (anomalous expansion). That is why lakes freeze from the top and life survives below.