A piece of iron having a square cross-section has a length of 30 cm, and it floats on mercury at 0^(@)C. If the temperature is raised to 100^(@)C, then what additional length of the piece will be immersed? Density of mercury at 0^(@)C=13.6g*cm^(-3), density of iron at 0^(@)C=7.6 g*cm^(-3), coefficient of real expansion of mercury =1.82 times 10^(-4@)C^(-1) and coefficient of volume expansion of iron =3.51 times 10^(-5@)C^(-1).

A piece of iron having a square cross-section has a length of 30 cm, a

1.	A piece of iron having a square cross-section has a length of 30 cm, and it floats on mercury at 0^(@)C. If the temperature is raised to 100^(@)C, then what additional length of the piece will be immersed? Density of mercury at 0^(@)C=13.6gcm^(-3), density of iron at 0^(@)C=7.6 gcm^(-3), coefficient of real expansion of mercury =1.82 times 10^(-4@)C^(-1) and coefficient of volume expansion of iron =3.51 times 10^(-5@)C^(-1).
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