Wright State University Lake Campus/2017-9/Phy1050/log

Wright State University Lake Campus/2017-9/Phy1050/Studyguide .. Wright State University Lake Campus/2017-9/Phy1050/Syllabus .. wright.miraheze.org

M 28 August 2017 (UTC)
Showed card game. Introduced Studyguide. Did first quiz on motion. Don't sweat these calculations if you can't do them. You have other ways to succeed in this class.

T 29 August 2017 (UTC)
Attendance policy: Allowed to miss 15 days without penalty. Nominally, you must attend 60 days to get 100%.

$$G = \frac{D}{55}\times 100%$$

and D is the days that you attend, OR 55 if you attend more than 55 days.

Polarizing filters. Maybe do another wikiquiz.

T 5 September 2017 Syllabus
Test prep: Questions 1-14 of second quiz Special:Permalink/1415990 has been discussed. (quiz called "velocity and acceleration"

user:Guy vandegrift .. hidden

W 6 Spitball motion lab

 * Why constant tapping of the ball is equivalent to a constant force: w:Special:Permalink/798712661
 * Physics_and_Astronomy_Labs/Uniform_acceleration_tapping_basketball_with_spitwads
 * Data is here

R 7 Spitball motion lab Data analysis
Physics and Astronomy Labs/Uniform acceleration tapping basketball with spitwads

https://www.youtube.com/watch?v=6ukMId5fIi0

M 9 Sep
Did you get email on test postponement? What did we do Thursday and Friday?

M 11 Sep: Miraheze wikifarms
Want more?

T 12 Sep

 * Today Test prep: Waves.
 * https://www.youtube.com/watch?v=IQ1q8XvOW6g beats But this is better: https://www.youtube.com/watch?v=pRpN9uLiouI  Even better: https://www.youtube.com/watch?v=vNuDxc9tZMk (stop at 3:06) 


 * Octave and fifth: Start at 1:27 https://www.youtube.com/watch?v=_Rg54Ie9zMQ


 * Go to Studyguide: 7/16 from 1409885 to b_waves_PC. Also: NOT ON THIS TEST: What happens to the wavelength on a wave on a stretched string if the wave passes from lightweight (low density) region of the rope to a heavy (high density) rope? Question 14 on studyguide.

Wed 13 Sep
Talks http://www.wright.edu/~guy.vandegrift/Talks/index.htm
 * natural 5/3 = 1.6667... http://www.wright.edu/~guy.vandegrift/Talks/cello.mp3
 * scientific 29/12 = 1.681793...http://www.wright.edu/~guy.vandegrift/Talks/piano.mp3

Caterpillar https://www.youtube.com/watch?v=ITqv3ey3h50

as Bach wrote it http://www.wimmercello.com/images/bachs1a.gif

Next day review

 * See w:User:Guy_vandegrift/Lectures/Just_and_equal_tuning

Friday 15 September 2017 Miraheze wikilabs

 * Sample report: https://wright032.miraheze.org/w/index.php?title=My_first_page&oldid=41

Monday 18 September Optics (for Test on Wednesday)

 * https://phet.colorado.edu/en/simulations/category/physics/light-and-radiation
 * https://phet.colorado.edu/en/simulation/bending-light
 * https://phet.colorado.edu/en/simulation/geometric-optics


 * also before the next test
 * https://phet.colorado.edu/en/simulation/legacy/wave-interference

Tues 19 September Sound(for Test on Wednesday)

 * I like this one
 * https://academo.org/demos/wave-interference-beat-frequency/

Monday 2 October Newton's Dark Secrets

 * $1.50 is not too much to charge, but awkward to pay: https://www.teacherspayteachers.com/Product/Isaac-Newton-PBS-Dark-Secrets-Guided-Viewing-Questions-1703344
 * Copyrighted and not right for college, but available at https://www-tc.pbs.org/wgbh/nova/education/activities/pdf/3217_newton.pdf

Summary of transcript
1 Newtwon wrote in code. Much of of his personal writings were never really understood as late as 1937.

2	3	4

5 An apple speeds up as it falls. At every instant in time it seems to have a certain speed. How do you mathematically describe this "instantaneous" velocity? $$v_{instant}=\frac{x_2-x_1}{t_2-t_1}$$ when the two times are nearly the same. See also File:Tangent as Secant Limit.svg

6	7	8	9	10	11	12	13	14	15	16

Wed oct 4 newton's cannon
File:Bisection_method.svg and Bisection method and Newton's cannon "$$6250m/s<v_{crit}<7000m/s$$ 4 October 2017 At 6250 we missed the center of the cannon by approximately on ball diameter. At 6200 it seemed to go higher. The for this second one was 3min32sec=212sec

4411 <Min <4411.5

Thur oct 5 curve fit newton's cannon

 * http://www.wright.edu/~guy.vandegrift/wikifiles/NewtonCannon.xlsx
 * http://www.xuru.org/rt/pr.asp is better than Excel for curve fitting
 * http://www.wright.edu/~guy.vandegrift/wikifiles/NewtonCannon.xlsx
 * http://waowen.screaming.net/revision/force&motion/ncananim.htm
 * PhET curve-fitting and PhEt least-squares-regression

Procedure:
 * 1) Measure distance "as crow flies" for v = 1000 and 4000 m/s.
 * 2) Predict distance for v=2000. Make a sketch showing how a graph and similar triangles would permit you to find a formula.  You can also get the formula by something called Regression_analysis
 * 3) Measure and calculate Big/Small and also percent error. The latter is (Measured&minus;True)/True.  You can report Big/Small as off by a factor of ....  For small errors (less than about 10% or so, they essentially give the same information).
 * 4) Fit your three points to a parabola.  It's best not to use Excel curve fit. There is an Excel extension, but it is more convenient to search the internet for "regression" fitting.
 * 5) Now use your parabola to predict the distance for v=3000.  Measure and compare as before.

We collected this data (USING A REDUCED IMAGE ON THE SCREEN): initial speed DISTANCE m/s    CM 1000	7.2 4000	36.9 2000	12.4 3000	19.9

Mon 9 Oct

 * 
 * https://www.nde-ed.org/EducationResources/HighSchool/Radiography/hs_rad_index.htm
 * Start here: https://www.nde-ed.org/EducationResources/HighSchool/Radiography/chemicalformula.htm

duck migration patterns
https://books.google.com/books?id=FSS8ctbOuGMC&pg=PA352&lpg=PA352&dq=duck+migration+patterns+radioactive+cesium&source=bl&ots=3svopK5fIx&sig=Mb8JFW2TuaPo7tpoDcj41kSnt2k&hl=en&sa=X&ved=0ahUKEwiQ8Z2JkenWAhWl1IMKHfk7Bv8Q6AEIXzAN#v=onepage&q&f=false

Tuesday 17 October: Guy's Wikipedia Lecture on Nuclear Power
See w:User:Guy_vandegrift/Lectures/Nuclear_power

19 October 2017 Thursday: Slide Whistle Music
Lifted from special:permalink/1752746: {3/2, 4/3, 5/3, 5/4, 6/5, 7/4, 7/5, 7/6, 8/5, 8/7}  V    IV   VI  III  iii  *     ? ?  vi    ? Here I used capital Romans for major and lower case for minor. The 7/4 is the devil's triad.
 * See also https://www.dctech.com/physics/notes/music/fractionscale2.png
 * Between 1 and 2, and going down from the first row I get:



Breaking Broomstick16:48, 24 October 2017 (UTC)

 * A model consists of one or more mathematical equations that attempt to describe reality.

tues 10/24 Start climate change: Where to start?

 * http://berkeleyearth.org/team/richard-muller/ and https://www.youtube.com/watch?v=Sme8WQ4Wb5w
 * Global_warming_controversy and Hockey stick controversy and List_of_scientists_opposing_the_mainstream_scientific_assessment_of_global_warming and Richard_A._Muller#Climate_change and http://www.wright.edu/~guy.vandegrift/climateblog/
 * http://www.wright.edu/~guy.vandegrift/climateblog/ : hide the error and hidden in plain sight

Test 3 global warming links

 * Muller lectures:
 * 1) "hide the decline"
 * 2) "I was wrong"

25 October Lab on finding slopes
This lab is in "Public Domain Format" with individual reports.
 * Verify and compare these claims:
 * 1) nationalgeographi.com (google) Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880.
 * 2) Summary of findings - Muller (berkeleyearth.org) The analysis shows that the rise in average world land temperature globe is approximately 1.5 degrees C in the past 250 years, and about 0.9 degrees in the past 50 years.
 * 3) Global warming
 * Translate this into degrees per mile here in Ohio, or degrees per day here in the spring or fall.
 * 1) Groundwater temperature Toledo to Cincinnati about 1C per 20 miles.
 * 2) https://www.mapsofworld.com/usa/thematic-maps/maps/usa-temprature-april.jpg december
 * 3) seasonal Cleveland seasonal ground (unknown location)
 * 4) temperatures are rising in the midwest

Resonances in a violin, viola, cello

 * http://acousticstoday.org/supplementary-text-violinacoustics-colin-e-gough/ simulation
 * https://www.youtube.com/watch?v=3uMZzVvnSiU actual wooden violin plate
 * Wolf tone:
 * How to fix: https://www.youtube.com/watch?v=_OqrJflI0j8
 * See also https://www.youtube.com/watch?v=yFiJXIA70U0 ?

Advanced curve fitting with Newton's cannon
v     t 6100   3m00s 6200  3m32s 6300  6m25s
 * Goal: Find the so-called "parabolic" curve File:Kepler_orbits.svg. Or more precisely, be able to predict periods for near-parabolic ellipses by extraplating. Let y=1/t, where t is the time to crash, and do a fit for y=y(v), where v is the initial speed. Data

Newton's_cannon_alarm_clock
Data taken in classroom: timer &loz; cannon v         t 6300 6320

Phet photoelectric lab

 * https://phet.colorado.edu/en/simulation/legacy/photoelectric
 * https://phet.colorado.edu/en/simulation/legacy/photoelectric

Test 3 global warming links

 * Estimates of rise
 * 1) nationalgeographi.com (google) Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880.
 * 2) Summary of findings - Muller (berkeleyearth.org)


 * Muller lectures:
 * 1) "hide the decline"
 * 2) "I was wrong"

Reviews for Test 3

 * Part 1: 11/1/17 (monday) link

Fun stuff (lecture mostly not on exams)
http://publicdomainreview.org/wp-content/uploads/scientificamusements-thumb.jpg
 * 1) Phet global warming: https://phet.colorado.edu/en/simulation/greenhouse
 * 2) Should we "do the math" on this coin-on elbow trick? http://publicdomainreview.org/wp-content/uploads/scientificamusements-thumb.jpg

Exponential decay lab

 * With dice
 * with froth

Radioactive dating

 * http://www.passmyexams.co.uk/GCSE/physics/radiocarbon-dating.html
 * Image stored at http://www.passmyexams.co.uk/GCSE/physics/images/carbon-dating.jpg

Ecliptic and Saros cycle

 * Pet lizard problem.
 * Saros_(astronomy) is a misnomer.
 * Eclipse season lasts about a month-typically get 1 or 2 solar and 1 or 2 lunar eclipses.