Download presentation

1
**Measurement and the Factor Label Method**

Chem 140

2
**SI base units SI (Système Internationale d’Unites) adopted in 1960**

Contains 7 base units: length: meter (m) mass: kilogram (kg) time: second (s) electrical current: ampere (A) temperature: kelvin (K) amount of substance: mole (mol) Luminous intensity: candela (Cd)

3
**Know Your Metric Prefixes**

value (exp.) value tera- (T) 1012 1,000,000,000,000 giga- (G) 109 1,000,000,000 mega- (M) 106 1,000,000 kilo- (k) 103 1,000 deci- (d) 10-1 0.1 centi- (c) 10-2 0.01 milli- (m) 10-3 0.001 micro- (µ) 10-6 nano- (n) 10-9 pico- (p) 10-12

4
**Derived units: speed 1 m s-1 1 meter… …in 1 second speed (velocity) 10**

20 30 40 60 70 80 90 50 1 meter… …in 1 second 1 m s-1 speed (velocity)

5
**Derived units: acceleration**

speedometer m s-1 Start

6
**Derived units: acceleration**

1 meter per second per second 1 1 m s-2 speedometer m s-1 After 1 second

7
**Acceleration – 6 m = s2 50 m/s… …to 20 m/s… …in 5 s change in speed**

time = –30 m s 1 5 s acceleration = = – 6 m s2

8
**Other derived units Force (newton, N): kg m s-2**

Work, energy (joule, J): kg m2 s-2 Power (watt, W): kg m2 s-3 Pressure (pascal, Pa): kg m-1 s-2 Volume: m3 Density: kg m-3

9
**Metric to English (Without Too Much Memorizing)**

1 inch = 2.54 cm 1 gallon (US) = 231 in3 1 lb. = g °C = (°F – 32) x 5/9 °F = (°C x 9/5) + 32 You can figure out many other conversions from these basic (exact) ones

10
**Factor-label method (on board)**

Convert 65 mph to m s-1, using the information on the previous slide, and english-to-english conversions. A car gets 35 mpg fuel mileage. What’s this in km/L? cubic meters to cm3

11
**Volume What is the volume of a cube 0.1 m (1 dm) on a side, in m3?**

Also called a “liter” (L)

12
Volume What is the length of each side of a cube with a volume of 1 mL? 0.001 L = m3 = (0.01)3 m3 = 0.01 m (1 cm) on a side

13
**1 m3 = 1 kL Length and Volume 1 Mg of water 1 cm3 1 kg of water = 1 mL**

10 20 30 40 60 70 80 90 50 1 dm3 = 1 L 1 cm3 = 1 mL 1 kg of water 1 g of water 1 Mg of water

14
**Volume and Mass Linear Cubic Liters Water 1 m 100 m 1 m3 100 m3 1 kL**

1 Mg 1 dm 10-1 m 1 dm3 10-3 m3 1 L 100 L 1 kg 1 cm 10-2 m 1 cm3 10-6 m3 1 mL 10-3 L 1 g 1 mm 10-3 m 1 mm3 10-9 m3 1 µL 10-6 L 1 mg

Similar presentations

Presentation is loading. Please wait....

OK

Unit Conversion Review

Unit Conversion Review

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on history of olympics locations Ppt on cross docking services Ppt on grid interconnection of renewable energy sources Ppt on digital media piracy control Ppt on latest technology in ece Ppt on forward and future contracts Ppt on 2nd green revolution Ppt on new technology in civil engineering Download ppt on civil disobedience movement in 1930 Ppt on space complexity