Physics
Some quantity of water at 0°C is heated to 20°С. Identify the correct graph showing the variation of volume of water with temperature.
- 1.
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- 2.
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- 3.
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- 4.
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Heat Energy
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Answer
option 4
Reason — As from 0°C to 4°C, water contracts so it's volume decreases as temperature increases, at 4°C water has maximum density and minimum volume and from 4°C to 20°C, water expands, i.e., volume increases as temperature increases.
So, the correct graph should show a decrease in volume from 0°C to 4°C and then an increase in volume from 4°C to 20°C. This forms a "U" shaped curve with the minimum point at 4°C.
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