3. Introductory Video Powers of 10 – Scales of the Universe

4. Objectives  Quickly estimate the answer to a complicated problem to within a factor of 10.  Find important facts in your textbook.

5. Order of Magnitude  Order of magnitude often refers to a number’s power of 10  Avagadro’s number is 6.02 x 10 23, it’s order of magnitude would be 10 23

6. Order of Magnitude Estimating  Rounding all numbers to one significant digit before performing operations.  Find an order of magnitude estimate for

7. Order of Magnitude Estimating  Rounding all numbers to one significant digit before performing operations.  Find an order of magnitude estimate for

8. Order of Magnitude Estimating  Rounding all numbers to one significant digit before performing operations.  Find an order of magnitude estimate for

9. Order of Magnitude Estimating  Rounding all numbers to one significant digit before performing operations.  Find an order of magnitude estimate for

10. Math in Physics Textbook Scavenger Hunt  You are going to be shown a series of questions  First person to raise their hand and answer correctly gets a shot at a Homework Pass

11. Math in Physics Textbook Scavenger Hunt  What is the resting mass of an electron in kg?

12. Math in Physics Textbook Scavenger Hunt  What is the resting mass of an electron in kg?  9.11 x 10 -31 kg (inside front cover)

13. Math in Physics Textbook Scavenger Hunt  What is the tangent of 46°?

14. Math in Physics Textbook Scavenger Hunt  What is the tangent of 46°?  1.036 (inside back cover)

15. Math in Physics Textbook Scavenger Hunt  What is the value of one henry in terms of its base units?

16. Math in Physics Textbook Scavenger Hunt  What is the value of one henry in terms of its base units?  1kg·m 2 /(s 2 ·A 2 ) (inside front cover)

17. Math in Physics Textbook Scavenger Hunt  What is the outer shell electron configuration for Ra?

18. Math in Physics Textbook Scavenger Hunt  What is the outer shell electron configuration for Ra?  7s 2 (inside back cover)

19. Math in Physics Textbook Scavenger Hunt  What is the formula for the surface area of a right circular cone?

20. Math in Physics Textbook Scavenger Hunt  What is the formula for the surface area of a right circular cone?  (page 1044)

21. Math in Physics Textbook Scavenger Hunt  What is the answer to problem #17 in chapter 4?

22. Math in Physics Textbook Scavenger Hunt  What is the answer to problem #17 in chapter 4?  0.557 m/s 2 (page 1069)

23. Math in Physics Textbook Scavenger Hunt  What is the Law of Sines?

24. Math in Physics Textbook Scavenger Hunt  What is the Law of Sines?  (page 1045)

25. Math in Physics Textbook Scavenger Hunt  25-point bonus question: Determine the thickness of one page from your book.

26. Math in Physics Textbook Scavenger Hunt  25-point bonus question: Determine the thickness of one page from your book.

27. Review: Can You  Quickly estimate the answer to a complicated problem to within a factor of 10?  Find important facts in your textbook?

28. Orders of Magnitude Perspective on Life

30. Homework  #23-30  Test Review