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Unformatted text preview: Chapter 1 Additional Notes We want to reexpress 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 For example: x = A = + A = A + 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 For example: x = A = + A = A + 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?...
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This note was uploaded on 01/02/2010 for the course PHY 101 taught by Professor Pralle during the Fall '08 term at SUNY Buffalo.
 Fall '08
 pralle

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