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Q1.
A student measured the width of a solid metal cube using a digital micrometer.
The figure below shows the micrometer
(c) The width of the cube was 18.45 mm. The density of the cube was 8.0 × 103 kg/m3
Calculate the mass of the cube.
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Mass = ________________________________ kg (5)
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18.45 mm = 18.45 × 10⁻³ m
V = (18.45 × 10⁻³)³
V = 6.28 × 10⁻⁶ m³
density = mass ÷ volume
8.0 × 10³ = m ÷ 6.28 × 10⁻⁶
m = 8.0 × 10³ × 6.28 × 10⁻⁶
m = 0.0502 kg
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