CAPE Physics Unit 1 · 2012 · Paper 1 · Question Q2
In determining the density of a cube, a student records the following measurements:
Length of side, l = 3.0 \pm 0.1\text{ cm}
Mass of cube, m = 12.5 \pm 0.5\text{ g}
The student then uses the equation \rho = \frac{m}{l^3} to determine the density of the cube. The percentage error in the calculated value of \rho is
- (A)0.6 %
- (B)7 %
- (C)14 %
- (D)40 %
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