1. First Day Materials Seating Chart – Attendance Teacher Introduction Syllabus Classroom Rules 3 rd Period – “Warm Body Count” Partners Website – Each PowerPoint will be posted on the website after we finish it in class. It contains answers to in-class problems, so they will not be posted before.

2. Textbook Make sure you have the correct textbook. Bring every block day. The district did not get online textbook access with the textbooks. Even though your book says there is an online textbook, you cannot access it.

3. Warm-Up: September 8, 2015 How many feet are in 100 yards?

4. A PHYSICS TOOLKIT Chapter 1

5. MATHEMATICS AND PHYSICS Section 1.1

6. Essential Questions How can we use mathematical tools to measure and predict? What are accuracy and precision? How do we display and evaluate data graphically?

7. What is physics? Physics is the study of the physical world, including energy and matter. Physics deals with the very small (protons, electrons, etc.), the very large (stars, galaxies, etc.), and everything in between. “Everything is physics. Physics is everything.”

8. Mathematics in Physics We will be doing a lot of math in the course. Mathematical models and equations describe (or approximate) physical phenomena.

9. There are seven base units. All other units are derived units, created by combining base units. SI Units - MKS system (Page 5)

10. Use: Numbers with very small and very large absolute values. Format: A number greater than or equal to one and less than ten multiplied by an integer power of ten. The exponent of the 10 tells us how many places to move the decimal point. 2.6 x 10 5 = 260000 2.6 x 10 -5 = 0.000026 Scientific Notation

11. 1. 0.00076 = 2. 65910000 = Example 1 Write in Scientific Notation

13. 1. 0.0034 = 2. 540 = 3. 65 = 4. 0.95 = 5. 33000 = Warm-Up: September 9/10, 2015 Write in Scientific Notation (No calculator)

14. You-Try #1 Write in Decimal Notation (No calculator)

15. Our sun sends out a constant “solar wind” of particles, mostly hydrogen atoms. Approximately 4 x 10 43 particles, each with mass 1.7 x 10 -27 kg, are blown away from the sun each year. 1. How much mass does the sun lose each year due to solar wind? 2. What percent of the sun’s total mass (2 x 10 30 kg) is lost each year? You-Try #2 - Application of Scientific Notation

16. SI Prefixes Can be used instead of scientific notation (or sometimes together).

17. SI Prefixes (page 6)

18. Dimensional Analysis

19. Think-Pair-Share In math, what are we allowed to multiply a quantity by, without changing the value of the quantity? What can we use besides “1” ?

20. Unit Conversion Factors

21. Example 3 How many seconds are in a leap year?

22. You-Try #3 (No calculator) A 5K race is 5 kilometers long. How many centimeters long is it?

23. Significant Digits (Significant Figures) With your partner, examine the following data and try to come up with a rule for determining how many significant digits a number has. NumberSig FigsNumberSig Figs 123304083 100340.90304 17225.9415 0.005130.024 700015.0304 7000.42502 7.0x10 3 24.10x10 -5 3

24. Significant Digits A digit is significant if it shows the precision of a number, not its magnitude. Non-zero digits are always significant. Zeros are sometimes significant. Zeros in between non-zero digits are always significant. Zeros at the beginning of a number are never significant. Zeros at the end of a number are significant if that number has a decimal point. The “x10 n ” in scientific notation is never included in determining the number of significant digits.

25. Significant Digits and Math You can never know the result of a mathematical operation to more certainty than you know the inputs. When adding or subtracting, round the answer to have the same amount of digits after the decimal point as the input with the fewest number of decimal places. When multiplying or dividing, round the answer to have the same amount of significant digits as the input with the fewest number of significant digits. Exact numbers have an infinite amount of significant digits.

26. Example 4

27. You-Try #4 (No calculator)

28. Assignment Read Section 1.1 (pages 2-10) Page 10 #13-16 Read Section 1.2 (pages 11-14)

29. Name, period, due date in the upper right corner of each page - blue or black ink Assignment written on the top line of each page – blue or black ink Each problem numbered and the original problem rewritten - blue or black ink Word problems may be summarized. The problem must be worked out in pencil. Sufficient work must be shown. Skip a line before each new problem. Assignment Format