Question

pls ans this question​

Answer 1

Answer:

1. Ice floats because ice is 9% less dense than water. The heavier water displace the lighter ice ,so ice floats on water. Ice takes up 9% more space than water , so a litre of ice weighs less than a litre of water

Answer 2

10 A:The water kept in an earthen pot remain cool even in summer because earthen pot has many small holes. Water seeps out through them and evaporates from the surface of the pot. The energy needed for evaporation is taken from the water kept in the earthen pot. As a result, water kept in earthen pot become cool.

11: See above attachment

12: A substance with lower density than water can float on water. Therefore, ice floats on water. When Water molecules freeze, The hydrogen bonds strengthen and push the other water molecules farther away. Hence, the space between the water molecules increases as it freezes from water.

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