PHY
Chapter One Notes

# Chapter One Notes - Chapter One Introduction I Dimension...

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Chapter One: Introduction I. Dimension: physical nature of a quantity A. Length, mass, time, etc. B. Brackets often used to denote dimensions of physical quantity C. Dimensional analysis: procedure to derive a mathematical expression or  equation or check its correctness 1. Makes used of the fact that dimensions can be treated as algebraic  quantities 2. Quantities can only be added or subtracted if they have same  dimensions II. Matter   atoms   nucleus   protons and neutrons   quarks III. Significant figures: reliably known digit A. Multiplication/Division: # of sig figs in final product/quotient is same  number of sig figs in least accurate of the factors  B. Addition/Subtraction: number of decimal places in result should equal the  smallest number of decimal places of any term
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Unformatted text preview: C. Zeros used to position the decimal point in numbers are NOT significant (ex: 0.03) IV. Order-of-magnitude estimate: approximate value, requires finding the power of 10 that is closest to the actual value of the quantity V. Cartesian Coordinate systems (x, y): used to specify locations in space, includes: A. Origin, O, fixed reference point B. Set of specified axes with appropriate scale and labels ob axes C. Instructions on labeling a point in space relative to origin and axes VI. Plane polar coordinate (r, ): point specified by the distance (r) from the Θ origin to the point and by the angle ( ) between the reference line a line Θ drawn from the origin to the point...
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