Describe an experiment to determine the density of the material of a coin.

Answer in Brief

The density of the material of a coin is determined by the following experiment:

We know density is mass per unit volume. So, first mass of the coin is measured by a common beam balance. Let it be M gram.
Volume of the coin is measured by a measuring cylinder as shown in the figure given below.
Take a measuring cylinder and fill it partly with water.
Note the level of water. Let it be V₁ mL.
Tie the coin with a thread and gently lower the coin inside the measuring cylinder. Take care that no water splashes out.
Note the level of water again. Let it be V₂ mL.
Find the volume of the coin (V) by subtracting V₁ from V₂.
V = V₂ - V₁
Density of coin is calculated by the formula: Density = `"Mass"/"Volume"`

D = `"M"/"V" "g cm"^(-3)`

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Chapter 2 Physical Quantities and Measurement
Short/Long Answer Questions | Q 7 | Page 35

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