Physics (Period 6)

May 17
May 6

David MacKay – a reality check on renewables…

   On Friday, you watched two videos – one an artistic video collage about climate change, and the other a TED talk by physicist David MacKay about renewable energy.


What was the main point of the first video?

Was it propaganda?  Why or why not?


In the first half of the second video, what “metrics” or calculations did the speaker use to understand the situation?  What did the graph of nations show (what were the axes, and what countries showed up where)? 
In the second half of the second video, what where the six changes – referred to as “levers” by the speaker?  Give examples. 


In your life as a human being in western Washington, which changes are you most likely to embrace?  Least likely?  Why?

April 19
Watch Video on Speed of light and index of refraction         
Monday, March 28
(10-A) Refer to pagest 136-146.  From pages 147 - 149, answer questions 2, 3, 4, 10, 11, 12, 14, 16, 17, 18, 26, 28, 29, 30.
Due Thursday.
Fosbury Flop Video from class today: 
Tuesday March 8
(29-A) Read pp 442-448 and preview/skim pp 448-459.
Answer questions #1 - 11 and 30 - 34. 
Thursday, Feb 17 
Tuesday, Feb 16
Do the practice questions and the practice problems at the following website.

Conceptual Physics, Chapter 15 – Special Relativity – Learning Targets (adapted from Paul Hewitt)

I can…

  • Give examples of relative motion. (15.2)

  • Discuss the constancy of the speed of light through empty space, and state its value in SI units. (15.3)

  • Define the term frame of reference, and describe what an inertial frame of reference is.

  • State Einstein’s first postulate of special relativity. (15.4)

  • State Einstein’s second postulate of special relativity.  (15.4)

  • Describe time dilation qualitatively. (15.6)

  • Use the time dilation equation to find the speed of an object you are observing, the elapsed time for the observer, or the elapsed time for the person moving.  (15.6)

  • Illustrate time dilation using the twin trip as an example. (15.7)

  • Explain how a space traveler could live long enough to travel a distance that it takes light 200 years to travel.   (15.8)

Advanced objectives (college physics level) – from Giancoli’s Physics

I can…

1. State in the student's own words the postulates of the special theory of relativity.
2. Explain what is meant by a frame of reference and distinguish between an inertial and noninertial frame of reference.
3. Explain what is meant by the principle of simultaneity and explain in your own words the "thought" experiment described in the text.
4. Explain what is meant by proper time and relativistic time and solve word problems involving time dilation.
5. Explain what is meant by proper length and relativistic length and solve word problems involving length contraction.
6. Explain what is meant by proper mass and relativistic mass and solve word problems related to the mass of a moving object as measured by an observer at rest relative to the object.
7. Use the principle of special relativity to determine the relative velocity of an object as measured by an observer moving with respect to the object.
8. Explain what is meant by rest energy and total energy and solve word problems involving Einstein's mass energy equation.

Do the practice questions and the practice problems at the following website.

Presentation dates  
Thurs Feb 18:  Keelyn/Jelco/Libby;  Anthony; Erin/Matt/Zach 
Friday Feb 19: Tessa/Ellie/Garrett; Colin/Emily/Autumn/Rachel
Monday Feb 22: Cameron/Michael S; Will/Tyler; Jon/Tim
Tuesday Feb 23: Michael G/Clemente


Thurs, Feb 8
If you missed it during class, watch the Mechanical Universe video on velocity and time.  Take notes as needed. 
Develop and  present your understanding of special relativity to the class.  (Do your own thing, or pair up, or work in a group of three.)
Friday, Feb 5
Picture of the heavy hitters of physics, early 20th c.  Who's your favorite?  Why?
(15-B) Read the rest of Chapter 15.  Answer the end-of-chapter Questions 11-18, 22.  Due Tuesday.
Monday, Feb 1
Assignment (15-A)  Have a look through Chapter 15 of Conceptual Physics.  Read pages 212 to 218.  Answer the end-of-chapter Questions 1 - 10, 19, 20, and 21.  Due Thursday.  Ask questions in class tomorrow.
Continue to learn from other books, websites, and videos. 
Tuesday Dec 15
Due Friday: (9-A) Refer to pp 122-128 of Conceptual Physics.  Answer end of chapter questions: #1-13, 20-22. 
Friday Nov 6
Due Monday: Stamp assignment (7-A) which is as follows.  Refer to Chapter 7 pp 86 - 91 of the textbook (Conceptual Physics).  From the end of the chapter, pp 100-102, do #1-6, 9, 11, 12, 24, 27, 29. 
Work ahead on (7-B) which is due for a stamp next Thursday: Refer to pp 92-99.  Do p 100-102 / #14, 15, 16, 25, 28, 33, 35, 36, 37. 
I hope you had a good day today in class. 
Tues Nov 3
Finish (5-A), turn in Thursday
Work on "Momentum Vectors" (yellow). 
Thurs Oct 29
Refer to Chapter 5 of Conceptual Physics by Paul Hewitt
Do (5-A):  pp 71-73 / # 5, 6, 12, 13, 14, 26, 31, 42.  Stamp on Monday, Turn in on Tuesday. 
Wednesday Oct 14
Do Assignment (3-A) which is as follows:  pages 40-42, #1, 2, 4, 6, 7, 8, 9; 19, 21, 25, 35, 41, 42, 45.  Stamp Friday at the start of class; ask questions.
Monday, Sept 28 
Read pages 17-24 of the textbook.
Do Assignment (2-B) which is as follows:  pages 25-27, #15, 16, 17, 22, 23, 24, 39, 47.   Due Thursday.
Day 10 - Monday Sept 21
- no new assignments tonight
Day 9 - Thurs Sept 17.  
  • Due Monday: Be sure you are "Ready for the Race Track"
  • Due Monday: Assignment (2-A) WHICH IS AS FOLLOWS: (2-A):Refer to pages 10 to 16 of Conceptual Physics.   See the Chapter Assessment on pp 25-27.  On a sheet of binder paper, answer assessment items 1, 2, 4, 5, 9, 12, 14, 29, 30, 34, 36, 42, 43, 44, 45, and 46 from pages 25-27.    Attempt all questions, and turn in Thursday at the start of class for a completion check (for a stamp), even if it is not perfect.  Then ask questions in class on Thursday, and turn the assignment in again on Monday for a grade.   
  • Due Monday: Flip Flop Units
  • Due Monday: All the Gas in Kingston.  Click on "Files" on the left for the assignment.
Day 8 Tuesday Sept 15
  • Do Assignment (2-A): Refer to pages 10 to 16 of Conceptual Physics.   See the Chapter Assessment on pp 25-27.  On a sheet of binder paper, answer assessment items 1, 2, 4, 5, 9, 12, 14, 29, 30, 34, 36, 42, 43, 44, 45, and 46 from pages 25-27.   
  • Metric Madness was scored for completion (5 points).  I did not check for accuracy but will post a key.
  • Flip-flop units was checked but not scored yet.  Revise it and turn in for 10 points on Monday.  Ask questions in Tutorial or in class Thursday.
  • All the Gas in Kingston:  I looked over it and was dismayed.  Please revise and turn in on Monday.  Let's talk / get help on Thursday if needed.  Revise!  Redo if you did a shoddy job!  (Some people did fine.  I may not be talking to you.  Show me yours Weds or Thurs if you are not sure and you want feedback.)  Goal: quality work.
Day 7 - Monday 9/14
Due Tuesday: Gold worksheet "Do Asteroids Accelerate"
Skim Chapter 2 of our textbook: Paul Hewitt's Conceptual Physics.
Day 6 Friday --
Due Monday: Do Asteroids Accelerate.
Also see Bowling Downhill, below.
Day 5 - Thursday, Sept 10
Due Friday:

On the next blank page in your lab notebook, write the title of the lab. Then make a graph that fills approximately onewhole page in your lab notebook. Plot it the standard way: time on horizontal axis; position vertically.

For each distance, plot both times on the graph (don't average them and plot one point)
(Also, don't connect the dots!)

time (sec) distance (meters) distance (m)
0 0 0
0.5 1.06 1.23
1 1.58 1.27
1.5 2.01 2.02
2 2.37

2.5 2.74

3 2.83 2.85

4 3.59

4.5 3.61 3.62
5 3.7 3.71

6 4.36 5.32


Day 4 - Tuesday
Due Thurs: Flip-Flop Units (yellow)
Due Friday: All the Gas in Kingston (green)
Due Friday: Metric Madness (pink)  Mega means 1,000,000 (one million).  kilo means 1,000.  centi means 1/100.  milli means 1/1000 (10 to the -3 power).  micro means 1/1,000,000 (10 to the -6).
Optional: Click here to find out where radio signals are forbidden.  Who in our class has lived close to Green Bank?
Turn in pink Safety Agreement 
Day 3 - Friday Sept 4
Same as the list below.   Also work on "Flip-flop Units." 
Day 2 - Thursday, Sept 3
Due Friday: Complete the lab activity "Roll It."  Best-fit curve, tangent line at the steepest part, find the slope of this tangent line (show your slope calculation).  Write a Conclusion that does the two following things.  Please (1) answer the "Question" clearly, and (2) explain, in sentences, the process that you used to find the ball's fastest speed, and why this process works.
Due Tuesday: Read over the Safety Contract.  Turn in the pink safety form, including your parent/guardian's signature.
Day 1 - Sept 2, 2015
Homework: Plot a position-time graph of the data from class today.  (position on vertical axis,  time horizontally).  Don't connect the dots. 

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