Q5 Describe an experiment to show that water has maximum density at 4℃. What important consequences follow from this peculiar property of water? Discuss the importance of this phenomenon in nature.
Q15 Describe an experiment to show that water has maximum density at 4°C.. What important consequences follow this peculiar property of water? Discuss the importance of this phenomenon in nature.
Q16 A deep pond of water has its top layer frozen during the water. State the expected temperature of the water layer (i) just in contact with ice, (ii) at the bottom of the pond.
(a) Water pipes in colder countries often burst in winter. (b) In winter, the water tank (or ocean) starts freezing from the surface and not from the bottom (c) Fishes survive in ponds even when the atmospheric temperature is below 0℃ (d) A hollow glass sphere that floats with its entire volume submerged in water at 4℃ sinks when water is heated above 4℃. (e) A glass bottle completely filled with water and tightly closed at room temperature, is likely to burst when kept in the freezer of a refrigerator.
