{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

This preview shows pages 1–7. Sign up to view the full content.

Chapter 1 Additional Notes We want to re-express a physical quantity into a different form (in terms of different units) without changing the physical meaning of the expression. There is two ways we can do this. The first is by adding zero to an expression

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

View Full Document
For example: x = A = 0 + A = A + 0 By adding zero we do not change the expression, this can always be done in interesting ways x = A + 3 3 = A + 5 5 = A + B B This is a common trick for completing the square when trying to factorize a polynomial
The second way is by multiplying by 1. x = A = 1 × A = A × 1 Again by multiplying by 1 we do not change the expression. How is this helpful when changing units? When comparing units, these are usually given as a equality meaning that the two sets of units are equivalent to each other. Since these are equivalent, dividing both sides by one of them will make that ratio of the units equal to one.

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

View Full Document
For example 1m = 3.28ft. So if we are given something in meters that we want to convert to feet then we divide both sides by 1m, this gives

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• 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.

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

• 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.

Dana University of Pennsylvania ‘17, Course Hero Intern

• 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.

Jill Tulane University ‘16, Course Hero Intern