Question
Using Archimedes' principle, describe an experiment to find the relative density of a solid denser than water.
✓
Answer
We can find the relative density of a solid denser than water by following the experiment.
Weighing a solid in air and water
Find the weight $\left( W _1 gf \right)$ of a solid in the air using a hydrostatic balance.
Tie the solid firmly with a thread and suspend it from the hook. Lower the solid in water and find its weight.
Record the result as shown below:
Weight of solid in air $=w_1 gf$.
Weight of solid in water $= W _2 gf$. The apparent loss of weight of solid $=\left( W _1- W _2\right) gf$.
Relative density $=W_1 /\left(W_1-W_2\right)$ The relative density of the solid = (weight of solid in the air )/(Apparent loss of weight of solid in water).
Weighing a solid in air and water
Find the weight $\left( W _1 gf \right)$ of a solid in the air using a hydrostatic balance.
Tie the solid firmly with a thread and suspend it from the hook. Lower the solid in water and find its weight.
Record the result as shown below:
Weight of solid in air $=w_1 gf$.
Weight of solid in water $= W _2 gf$. The apparent loss of weight of solid $=\left( W _1- W _2\right) gf$.
Relative density $=W_1 /\left(W_1-W_2\right)$ The relative density of the solid = (weight of solid in the air )/(Apparent loss of weight of solid in water).
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