A cubical copper block has eahc side 2.0 cm. It is suspended by a string and submerged in oil of density 820 kg m^(-3). Calculate the tension in the string. (density of copper = 8920 kg m^(-3))

A cubical copper block has eahc side 2.0 cm. It is suspended by a stri

1.	A cubical copper block has eahc side 2.0 cm. It is suspended by a string and submerged in oil of density 820 kg m^(-3). Calculate the tension in the string. (density of copper = 8920 kg m^(-3))
Answer» Solution :Tension = true WEIGHT - upthrust DUE to oil `= V rho g - V sigma g = V (rho - sigma) g` `=(2 xx 10^(-2))^(3) xx (8920 - 820)xx 10 =8 xx 10^(-6) xx 8100 xx 10`.