During a experiment, one measured the mass of a mosquito and found it to be 1.20 x 10^-5 Kg. The numbers of significant figures in this case are:
Correct answer: D. Three
- A. Five
- B. One
- C. Two
- D. Three
Explanation
All non zero digits are significant figures and in this case there are 3 significant or non zero digits hence option D is the right choice.
This question appeared on the ETEA MDCAT 2014 paper, which you can sit online with every answer explained.
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About Errors and Significant Figures
Measurement errors include random and systematic effects, absolute, fractional and percentage uncertainty, and the precision shown by significant figures. Questions apply rounding rules and uncertainty propagation in addition, subtraction, multiplication and division, while distinguishing accuracy from precision and uncertainty from an actual mistake.
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