STANDARD Physics Significant Figures MCQ Question
The mass of a box measured by a grocer's balance is 2.3 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. The total mass of the box is
2.3 kg
2.340 kg
2.34 kg
2.3403 kg
Correct Answer
Detailed Explanation
The total mass is calculated by adding the mass of the box and the masses of the gold pieces. The gold pieces are converted to kg: 20.15 g = 0.02015 kg and 20.17 g = 0.02017 kg. Total mass = 2.3 kg + 0.02015 kg + 0.02017 kg = 2.34032 kg. Rounding to one decimal place gives 2.3 kg.
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