eet 109 math october 5,2015 week 2 day 1. united states silver dollars 1794 – 1803 up to $2,000...
TRANSCRIPT
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EET 109 MathOctober 5,2015
Week 2 Day 1
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United States Silver Dollars
1794 – 1803 Up to $2,000 used $50,000 new
1836 – 1839 Up to $1,000 used $5,000 new
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Carat versus Karat
carat: a unit for measuring the weight of jewels (such as diamonds) that is equal to 200 milligrams.
karatA unit of weight equal to 200 mg (3.1 grains). Also used as a measure of gold purity (per 24 parts gold alloy).
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Chapter 1
Fundamental Concepts
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Home work Week 1
Appendix B4 question 20.Paint needed to paint a house. Should be measured in liters but once
applied the answer could be meters squared.
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Turn in completed home work not partial.
Staple your work together and in order.
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Graded and Recorded
10/10 8/10 Score
Scored and recorded.
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ENGINEERING NOTATION
The letters replace the math.
50mA is 50 milliamps.
NOT 50 x mA
The m replaces x
At most 3 numbers one letter one unit of measurement.
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Chapter 1
Fundamental Concepts
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1.11 FORMULAS page 40
A formula is an equation, usually expressed in letters, that shows the
relationship between quantities.The letter being something we are interested in.
$ I got = $ I earned - $ I spent.
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1.11 FORMULAS page 42
Solving a formula means to isolate a given letter on one side of the equal sign.
We solve formulas using the same principles used solving equations.
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1.12 SUBSTITUTION OF DATA INTO FORMULAS Page 45
#1 is saying the same as stated earlier:Solving a formula means to isolate a given letter on one side of the equal sign.
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1.12 SUBSTITUTION OF DATA INTO FORMULAS Page 46
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1.11 Page 43
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Ohm’s Law
Three units three variations.Multiplication and division.
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Exercises 1.12 page 48 number 13
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Exercises 1.12 page 48 number 13
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75.0 is 2 keystrokes on a calculator that do nothing but create an opportunity to make a data entry error.
75Ω is just a unit and is not needed for calculations.
Hz is just a unit and is not needed for calculations.
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In class exercise.
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Chapter 3
Right-Triangle Trigonometry
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Jump to Chapter 3Objectives Understand the degree/minute/second and radian measures of an angle. Know the Pythagorean theorem. Know the ratio definitions of the trigonometric functions. Know the values of the trigonometric functions for key angles. Use a calculator to evaluate trigonometric functions. Solve right triangles.
You have to know the triangle first.
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A right triangle has one right angle, two acute angles, a hypotenuse.
A right angle is an angle of 90°An acute angle is an angle whose measure is less than 90°.
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Page 115
How much is the rotation; how large is the angle?Angles can be measured using any of three units of measure:
revolutions degrees radians
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Revolutions RPM
The side originates at the center, it is a line.
This will correspond later to ordered pairs and
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Degrees 360 degrees = 1 revolution
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The one radian is just under 57.3 degrees.
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Where are the triangle?
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A, B, C are angles.a, b, c are sides.
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The Pythagorean theorem gives the relationship
among the sides of a right triangle.
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Pythagorean Theorem page 118
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Page 119
The 6 trigonometric ratios express the relationship between and acute angle of a right triangle and the length of 2 sides.
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Page 133Note: While all six trigonometric rations may be used to solve a right triangle, we will usually choose sine, cosine, and tangent because these buttons appear on calculators.
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The Soup is Cold o a oh ah
Tan = Op/AdjSin = Op/HypCos = Adj/Hyp
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SOH CAH TOA
Sin = Op/HypCos = Adj/HypTan = Op/Adj
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The side opposite the angle.
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The side opposite the angle.
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For Trigonometry you will need a calculator.
All ProgramsAccessoriesCalculator
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View
Scientific
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