1. Chapter 2 Measurements and Calculations

2. Paper Cup Demo http://www.youtube.com/watch?v=gQpUQ u9bkAc&feature=relatedhttp://www.youtube.com/watch?v=gQpUQ u9bkAc&feature=related

3. I. Scientific Method * a systematic approach to solving a problem (pp13) 1. State the problem 2. Gather information 3. Form hypothesis 4. Perform experiments 5. Record and analysis data 6. State conclusion

4. II. Units of Measurements Factor/Label: ex ’ s Derived Units –Table 2-3 pp 36

5. Density: = (m) / (v)units?? g/ml ***table 2-4 pp 38** Volume: = (l) (w) (h) units?? cm 3

6. A. Heat and Temp *Temp: *Heat: ex ’ s: pp 511-512

7. -Kelvin:  Freeze: 273.15  Boil: 373.15  K = (  C) + 273  0 K is absolute 0

8. -Celsius  Freeze = 0 ° C Boil = 100 ° C ° C = (5/9) (  F - 32)

9. -Fahrenheit: Freeze = 32 °F Boil = 212 °F °F = (9/5) (°C) + 32

10. -Units of Heat *Joule (J) *Calorie (c): c = 4.184

11. -Heat Cap. and Spec. Heat *HC: pp 513 Fig. 17-1

12. -Spec. Heat = heat lost or gained (J or Cal) mass(g) X ∆ in Temp ( °C) Cp = ______q______ (m) (∆ T)

13. Examples 1.Determine the specific heat of a material if a 35g sample absorbed 48 J as it was heated from 293 K to 313 K. A:.069 J/(g*K)

14. Examples 2. How much heat is needed to raise the temperature of 5 g of gold by 25 C? A: 16 J

15. Examples 3. If 980 kJ of energy are added to 6.2 L of water at 291 K, what will the final temperature of the water be? A: 329 K

16. Elements Introduction http://www.youtube.com/watch?v=DYW50F42ss 8http://www.youtube.com/watch?v=DYW50F42ss 8 http://www.youtube.com/watch?v=AGZ20OrmY Bshttp://www.youtube.com/watch?v=AGZ20OrmY Bs

17. III. Scientific Measurements *Accuracy: *Precision: ex ’ s: pp 44 *Percent Error = Value acc - Value exp Value acc

18. *Significant Figures: ex ’ s: *Scientific Notation: 1.Move dec. right until only 1 nonzero digit remains 2.Determ Expo by the # of spaces moved-- Left + Right -

19. IV. Solving Quantitative Problems 1.Write what you know and what you are trying to find 2.Set up F/L parentheses 3.Get rid of unit 4.Bigger unit = 1 5.Make a true statement in the parentheses

20. 6.Calculate 7.See if the answer is logical 8.Write units

21. -Proportional Relationships 1.Directly: y/x = k or y = kx 2.Inversely: xy = k or y = k/x **ex ’ s and graphs http://mathcentral.uregina.ca/QQ/databas e/QQ.09.00/ellis1.html