(adsbygoogle = window.adsbygoogle || []).push({}); Uncertainty?? URGENT HELP

How do you answer this??? I totally don't get it. What do I do to calculate the uncertainty percentage??

Q. The number of significant figures reported for a measured value suggests a certain degree of precision.

What is the relative uncertainty implied by the following numbers?

a) 0.30 implies an uncertainty of ± _____ %

b) 9.8 implies an uncertainty of ± _____ %

c) 52 implies an uncertainty of ± _____ %

d) 0.503 implies an uncertainty of ± _____ %

Answers:

a) 0.30 implies an uncertainty of ± 3 % (possibly 2% from rounding error)

b) 9.8 implies an uncertainty of ± 1 % (possibly 0.5% from rounding error)

c) 52 implies an uncertainty of ± 2 % (possibly 1% from rounding error)

d) 0.503 implies an uncertainty of ± 0.2 % (possibly 0.1% from rounding error)

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Uncertainty? HELP

**Physics Forums | Science Articles, Homework Help, Discussion**