Write down the number of significant
figures in the following: 0.003 m²,
0.1250 gm cm2, 6.4 x 106 m, 1.6 x 10-19
C, 9.1 x 10-31 kg.
[Ans: 1, 4, 2, 2,2]
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Answer: 3, 4, 2, 2
Explanation:
Zero before the decimal point is not a significant figure.
Same for the second one. Zero after the decimal point is a significant figure.
For counting significant figures of the last two, you will neglect the power term and only count the significant figures of the preceding decimal number.
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