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Question
State the number of significant figures in 0.007.
State the number of significant figures in 0.007.
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Solution
Rules of significant figures
- All the reported non-zero numbers in measurement are significant. For example, 22.13 has 4 significant figures.
- Zeroes sandwiched anywhere between the non-zero digits are significant. For example, 102.4 has 4 significant figures.
- Zeroes to the left of a first non-zero digit are not significant. For example, 007 has 1 figure.
- The trailing zeroes or the zeroes to the right of the last non-zero digit are significant if the number has a decimal point otherwise they are insignificant. For example, 0.00001020 has 4 significant figures.
Hence, 0.007 has only one significant figure.
Rules of significant figures
- All the reported non-zero numbers in measurement are significant. For example, 22.13 has 4 significant figures.
- Zeroes sandwiched anywhere between the non-zero digits are significant. For example, 102.4 has 4 significant figures.
- Zeroes to the left of a first non-zero digit are not significant. For example, 007 has 1 figure.
- The trailing zeroes or the zeroes to the right of the last non-zero digit are significant if the number has a decimal point otherwise they are insignificant. For example, 0.00001020 has 4 significant figures.
Hence, 0.007 has only one significant figure.
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