1. SI - System International The Metric System

2. How high is the ceiling?

3. 1.0 0.1

4. Is the ceiling 5 glops high? A.Yes B.No

5. What must be true of any STANDARD ? Universally Understood Repeatable

6. Old Standards Digit Cubit Foot Hands Stone What is the problem with these Standards?

7. Metric System Began in 1795 - French Standardized - 1960 –What does this mean? Terms to Know –Fundamental / Derived –Quantity / Unit

8. Fundamental vs Derived Fundamental Units –Base Unit which is defined to be Universally Understood and Repeatable –7 Fundamental Units Derived –A combination of more than 1 fundamental units –Examples: m/s; s 2 ; kgm / s 2 –Often given an equivalent expression: Newton, Watt, Joule

9. Quantities vs Units Quantities Amount or how much of a specific dimension Examples: Length, Mass, Volume, Density Units Describes the size in which a quantity is measured Examples: meter, foot, inch, mile second, hour, minute, millenium

10. 7 Fundamental Units / Quantities Length - meter Mass - kilogram Time - second Electric Current - Ampere Luminous Intensity - candela Temperature - Kelvin Amount of Substance - mole

11. Standard Definition - meter Old Definition 1 m is defined as 10 -7 of the distance from the North Pole to the Equator along a line through Lyon, France New Definition (1960) 1 m is defined as 1650763.63 times the wavelength of orange-red light from a Krypton-86 lamp Newest Definition (1982) 1 m is defined as the distance light travels in a vacuum in 1/2999792458 of a second

12. Standard Definition - second Old Definition 1 s is defined as 1/86400 of a mean solar day New Definition (1960) 1 s is defined as duration of 9192631770 cycles of the radiation from Cesium-133

13. Standard Definition - kilogram Old Definition 1 kg is defined as the mass of water at its densest (T= 4°C) which fills a volume of 1.0 liter New Definition (1960) 1 kg is defined as mass of a cylinder of platinum-iridium alloy kept at the International Bureau of Weights and Measures near Paris

14. Systems of Measurement mks - Meter, Kilogram, Second cgs - Centimeter, Gram, Second fps - Foot, Pound, Second Note: These units are fundamental in that system. What does it mean to be fundamental???

15. Systems of Measurement Red = Fundamental

16. Systems of Measurement Red = Fundamental

17. Systems of Measurement Red = Fundamental

18. Systems of Measurement Red = Fundamental

19. Prefixes Large kilok10 3 MegaM10 6 GigaG10 9 TeraT10 12 PetaP10 15 Smaller centic10 -2 millim10 -3 microµ10 -6 nanon10 -9 picop10 -12 femtof10 -15 Kids Hate Doing My Dumb Crazy Math