An object of mass 400g and density 600kgm-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm-3. The tension in the str...

Assessment: JAMB UTME - Physics - 1993 Subject: Physics

Question 1 Report

An object of mass 400g and density 600kgm-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm-3. The tension in the string is

1.0N

3.0N

4.0N

5.0N

Answer Details

volume of object =

\frac{400 \times 10^{- 2}}{600}

= 0.00067m3

volume of paraffin displaced = $\frac{1}{2}$ x 0.00067

= 0.00034m3

mass of paraffin = 900 x 34 x 10-5

= 0.3kg

weight of paraffin = 0.3 x 10

= 3N = upthrust = tension in the string

Read lesson note on Measurements And Units (JAMB)

Measurements And Units

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