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Grade 99 grade science

explain – a hollow glass sphere which floats with its entire volume submerged in water at 4C sinks when water is heated abov 4C

Profile image of Tanisha Srivastava
8 Years agoGrade 9
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1 Answer

Profile image of Darsh patel
8 Years ago
This is because at 4 degrees celcius, water is at its peak density. This high density is due to the fact that water at this temperature gets more contracted than usual and will have a low volume with a higher density. This is the reason why the hollow sphere stays a float and will only sink after the water is heated above the 4 degrees celcius. The sinking is because, when the water is heated above the 4 degrees celcius, it starts to expand and its density falls hence not able to keep the sphere afloat.