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Question

How many significant figures are there in 0.310×105 m ?

A
2
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B
3
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C
4
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D
5
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Solution

The correct option is B 3
We know that,
1. All non-zero digits are significant figures.
2. If measurement is less than 1 then the terminal zeroes are significant.
3. In scientific notation, a×10x, we consider the significant figures of a.
Based on the above rules, there are 3 significant figures in 0.310×105 m.

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