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Significant Figures

  • Thread starter jeehoo
  • Start date
  • #1
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Homework Statement


We measured 2 values and were asked to calculate their average using sig fig
The two values were: 1.56324 N and 1.13405 N.

( 1.56324 N + 1.13405 N ) / 2 = 1.348645 N

Would the answer be 1.34865 N or 1 N?
(Someone told me that we only use the sig figs of measured values, which are 1.56324 N and 1.13405 N.)

Homework Equations


avg. = sum of values / number of values

The Attempt at a Solution


I think it's 1 N since when dividing or multiplying you use the sig fig of numbers with the least amount of sig figs.
 

Answers and Replies

  • #2
Doc Al
Mentor
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I think it's 1 N since when dividing or multiplying you use the sig fig of numbers with the least amount of sig figs.
Realize that the 2 you are dividing by is an exact number. Dividing by an exact number does not impact the number of significant digits in your answer.
 

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