US Supreme Court Decides Loveing v. Virginia (1967)

1. US Supreme Court Decides Loveing v. Virginia (1967) • HW#2.2: DUE MONDAY • Chap. 2, #s 57-63 (all), 65, 67, 69, 71, 73, 79, 82, 85, 87, 89, 91, 92, 93, 95, 101, 105, 109, 143, 153 • Dimensional Analysis Homework: DUE MONDAY • Posted on the website • For lab Monday (wet lab) • You must have your goggles!!!! • You must have a lab BOOK (not lab manual)

2. The Metric System • Built on BASE UNITS and PREFIXES • Base Units: • gram – g 2.35 g 1.673x10-24g • liter – L 3.78 L 4.3x103 L • meter – m 100. m 5.29x10-11 m • second – s 135 s 86400 s • others 4.184 J 755 torr ENERGY VOLUME LENGTH TIME MASS PRESSURE

3. tera 1 T = 1x1012 giga 1 G = 1x109 mega 1 M = 1x106 kilo 1 k = 1x103 BASE deci 1 d = 1x10-1 centi 1 c = 1x10-2 milli 1 m = 1x10-3 micro 1 m = 1x10-6 nano 1 n = 1x10-9 pico 1 p = 1x10-12

4. The Metric System 1 milligram  1 mg = 1x10-3g 1 milligram 1 milligram  1 mg = 1x10-3g 1 kilometer 1 kilometer 1 kilometer  1 km  1 km = 1x103m = 1x103g

5. The Metric System 1 microliter 1 microliter 1 microliter  1 mL  1 mL = 1x10-6L = 1x10-6L 1 gigabyte 1 gigabyte 1 gigabyte  1 GB  1 GB = 1x109B = 1x109B

6. Metric Conversions Convert 1.66 seconds to ms 1 ms 1 ms 1 ms 1x10-6 s 1x10-6 s = 1x10-6 s

7. Metric Conversions Convert 4.2533x10-2 mL to L 1 mL 1 mL 1 mL 1x10-3 L 1x10-3 L = 1x10-3 L

8. Metric Conversions Convert 98.5 cm to meters 1 cm = 1x10-2 m

9. Metric Conversions Convert 5.234x108 g to Mg 1 Mg = 1x106 g

10. Metric Conversions When converting from one prefixed unit to another always go to the base unit first! Convert 2.91x108 nm to km (nm  m  km) 1 nm = 1x10-9 m 1 km = 1x103 m 1 nm 1x103 m 1x103 m 1 nm

11. Metric Conversions When converting from one prefixed unit to another always go to the base unit first! Convert 0.1611 dL to mL (dL  L  mL) 1 dL = 1x10-1 L 1 mL = 1x10-3 L 1 dL 1x10-3 L 1x10-3 L 1 dL

12. Conversions Factors and Sig. Figs. A conversion factor is DEFINED if and only iff: ALL units are from the same system of measure AND ALL units measure the same quality (remember, the number 1 is always considered to be counted)

13. pound = standard in2 = standard sig. figs COUNT pound = weight in2 = area 3 sig. figs mile = standard in = standard sig. figs DO NOT COUNT (∞ s.f.) mile = distance in = distance mm = metric m = metric sig. figs DO NOT COUNT (∞ s.f.) mm = distance m = distance m = metric ft = standard sig. figs COUNT (4 s.f.) g = metric mL = metric sig. figs COUNT (6 s.f.) g = mass mL = volume

14. Conversions Convert 781505 gallons to liters 1 gallon = 3.785 L   2.957996425x106 L  2.958x106 L  2.957996425x106 L

15. Conversions The density of mercury is 1 mL = 13.55 g. Convert 463.7710 g of mercury to mL of mercury.  34.22664207 mL  34.22664207 mL  34.23 mL

16. Conversions Convert 3.81 mm  ft

18. Conversions Convert 3.81 mm  ft “Game plan” -- mm  m  ft “Game plan” -- “Game plan” -- mm “Game plan” -- mm  m What do I know? 1 mm = 1x10-3m 1 mm = 1x10-3m, 1 m = 3.281 ft

19. Conversions Convert 3.81 mm  ft “Game plan” -- mm  m  cm “Game plan” -- “Game plan” -- mm  m  cm  in  ft “Game plan” -- mm  m  cm  in “Game plan” -- mm “Game plan” -- mm  m What do I know? 1 mm = 1x10-3 m, 1 cm = 1x10-2 m, 1 in = 2.54 cm, 12 in = 1 ft