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Answer» Rules for counting significant figures: | Rule | Exmaple | | (i) | All non- Zero digits are significant | 1340 has four significant figures | | (ii) | All zeros between two non- zero digits are significant | 2008 has four significant figures | | (iii) | All zeros to the right of a non- zero digit but to the left of a decimal point are significant. | 30700 has three significant figures | | (iv) | (a) The number without a decimal point, the terminal or trailing zero (s) are not significant.
(b)All zeros are significant if they come from a measurement | (a) 30700 has three significant figures
(b) 30700 m has five significant figures | | (v) | If the number is less then 1, Zero (s) on the right of the decimal point but to left of the first non- zero digit are snot significant. | 0.0035 has three significant figures | | (vi) | All zeros to the right of a decimal point and to the right of non-zero digit are significant. | 40.00 has four significant figures and 0.030400 has five significant figures | | (vii) | The number of significant figures does not depend on the system of units used | 1.53 cm, 0.0153 m, 0.0000153 km, all have three significant figures |
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