SigFigs - UT Austin College of Natural Sciences Prep...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
UT Austin College of Natural Sciences: UNIT02: Measurement Prep Materials for College Level Chemistry Significant Figures (Significant Digits) If we give 40 people ten Vernier calipers and one line to measure, there is very little chance that all 40 people will come up with the exact same number for their measurement. They’ll get things like 4.45, 4.46, 4.43, 4.44, 4.45, etc. So what is the true measurement? Significant figures help us handle such cases. Significant figures rules exist for measurements and for computations with measurements. This section introduces these rules. The Point: Report only ONE questionable digit for measurements. In the example with the Vernier caliper above, everyone agrees on the “4.4” part of the measurement. The hundredths-place is the questionable digit. The Exceptions: Counting Numbers and Defined Quantities The Exceptions: Counting numbers are said to have infinite significant digits. That is to say, if there are three people in the room, no one will say there are 2.999 people in the room. (That would be awkward!) We will all agree there are 3.00000000000…
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern