![Page 1: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/1.jpg)
One Last Chapter 2 Thing
Mixture Pancake Batter, Orange Juice, Cement
SolutionSyrup, Apple Juice,
White Gold (mixture of Au and Pt atoms)
Solutions are mixtures, but not all mixtures are solutions.
Think of it this way: solutions (to anything!) are special.
![Page 2: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/2.jpg)
The Basic UnitsPhysical Quantity Name of Unit Symbol
Length meter m
Mass kilogram kg
Time second s
Temperature kelvin K
Number of objects mole mol
Luminous intensity candela cd
Electric current ampere A
![Page 3: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/3.jpg)
Those units are not the only rational choice.
![Page 4: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/4.jpg)
Compound Units
•Velocity is a compound unit: distance over time: m/s or m-s-1
•Force is another: mass times acceleration: kg-m/s2 = 1 Newton
•Pressure is yet another: force over area = mass times acceleration over area
= (kg-m/s2)/m2 = Newton/m2 = Pascal
•There are many more (viscosity: g-cm-1s-1 = Poise)
![Page 5: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/5.jpg)
Prefix Symbol Meaning
femto- F 10-15 = 1/1,000,000,000,000,000
pico- P 10-12 = 1/1,000,000,000,000nano- N 10-9 = 1/1,000,000,000
micro- 10-6 = 1/1,000,000
milli- m 10-3 = 1/1,000centi- c 10-2 = 1/100deci- c 10-1 = 1/10kilo- k 10+3 = 1000mega- M 10+6 = 1,000,000
giga- G 10+9 = 1,000,000,000tera- T 10+12 = 1,000,000,000,000
![Page 6: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/6.jpg)
What is the gravitational acceleration in cgs units?
![Page 7: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/7.jpg)
One
Unity = 1
2.54 cm = 1 inch
[2.54 cm/1 inch] = 1 = [1 inch/2.54 cm]
![Page 8: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/8.jpg)
Compute the length of a football field in centimeters.
![Page 9: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/9.jpg)
Compute the volume of rain, in gallons, that fell a football field (100 yards long x 50 yards wide) if the weather guy said we got
one inch of rain.
![Page 10: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/10.jpg)
Break: Today’s AnnouncementsMonday, September 10 announcements
We are maybe one day behind—not bad, considering!
Ch 2 notes are essentially in final form.
New Appendix ABC notes are available.
Watch for a take-home exam to appear on website “soon”
You should have completed many of the assigned Ch. 2 problems.
![Page 11: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/11.jpg)
Estimate the pressure on your feet when you stand up. Express the answer in pounds per square inch, and in nt/m2.
![Page 12: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/12.jpg)
Estimate the pressure when you sit on your xxxx, in pounds per square inch, and in nt/m2.
![Page 13: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/13.jpg)
oF = 32 + 1.8oC oC = (oF - 32)/1.8
K = oC + 273.15
Temperature: who the heck was Fahrenheit
![Page 14: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/14.jpg)
Summer in Duluth
Body Temp. (Humans)
Winter in Duluth
Rectal temperature of the cow
Room Temperature
Liquid N2
16 oC = 61 oF
98.6 oF = 37 oC
-40 oF = -40 oC
100 oF
77 oC = 25 oC
77 K = -196.15 oC = -321oF
Convenient Temperature Conversions
![Page 15: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/15.jpg)
Precision vs. Accuracy
![Page 16: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/16.jpg)
Wrong Right Why
1.867 + 2 = 3.867
1.867 + 2 = 4
Addition/Subtraction: use least precise places1.867 +
2.000 = 4
1.867 + 2.000 = 3.867
"
1.867 x 2 = 3.734
1.867 x 2 = 4 Multiply/Divide: use smallest number of significant figures1.867 /
2.000 = 1
1.867/2.000 = 0.9355
"
S
I
G
N
I
F
I
C
A
N
T
F
I
G
U
R
E
S
![Page 17: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/17.jpg)
A Lost Art—Reading Gauges
What does it read? Don’t forget to guess! What if we had to put + and – on it?
23 3 For sure
23 1 Probably
![Page 18: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/18.jpg)
Noise is Normal!
A balance that reads 1.00053 to 1.00055 is working!
A gauge that bounces around a bit is working!
(In fact, if it doesn't bounce, it might be stuck)
![Page 19: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/19.jpg)
Exponential Notation
•Use it when it is EASIER. •Your calculator has an “E” button—learn how it works
To code in Avogadro’s number (we’ll see this later) push
6-.-0-2-3- E-2-3.
![Page 20: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/20.jpg)
Remember the Rules!!!
(6 x 1023) x (3 x 1013) = 18 x 1036
Products: Add Exponents
(6 x 1023) / (3 x 1013) = 2 x 1010
Quotients: Subtract Exponents
![Page 21: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/21.jpg)
Percent Errors
Suppose we measure a square tile, and find that each edge of the tile is L = 12.1 0.2 inches. What is % uncertainty?
![Page 22: One Last Chapter 2 Thing MixturePancake Batter, Orange Juice, Cement Solution Syrup, Apple Juice, White Gold (mixture of Au and Pt atoms) Solutions are](https://reader034.vdocument.in/reader034/viewer/2022042718/56649eeb5503460f94bfd0c8/html5/thumbnails/22.jpg)
Error Propagation
What is the uncertainty in the area of the square tile?