The edge of a cube is a = 1.2×10⁻² m. How should its volume be recorded with the correct significant figures?
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Question

The edge of a cube is a = 1.2×10⁻² m. How should its volume be recorded with the correct significant figures?

G1 Physics · Accepted Answer

a=1.2×10⁻² m has 2 significant figures. Volume a³=(1.2)³×10⁻⁶=1.728×10⁻⁶ m³, which to 2 significant figures is 1.7×10⁻⁶ m³. Correct answer: A.