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Tag Archive for: units

Learn Dimensional Analysis

Learn the Basics of Dimensional Analysis

July 18, 2019
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6 Comments
As a university teacher and as a PF member, I have often noted that students are largely unaware of or not using dimensional analysis to help them in their…
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unitsworkforyou

How to Make Units of Measurement Work for You

December 1, 2017
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13 Comments
How do we use units? You may see one of these speed limit signs, nearly every day. Even though neither of them displays units, drivers know they are implied.…
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angledimensions

Can Angles be Assigned a Dimension?

November 12, 2016
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106 Comments
1. Some Background on Dimensional Analysis ... if you are not already familiar with it. 1.1 Dimensions Dimensional Analysis is a way of analyzing…
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speedoflight

Why Does C Have a Particular Value, and Can It Change?

September 10, 2015
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53 Comments
Short answer: Because c (speed of light) has units, its value is what it is only because of our choice of units, and there is no meaningful way to test…
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error handling

Frequently Made Errors: Equation Handling in Physics

May 13, 2015
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15 Comments
1. Algebra versus Arithmetic When numerical values are provided as inputs in a question, it is tempting to plug these into the equations straight away.…
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