Wright State University Lake Campus/20179/Phy1050/log
Wright State University Lake Campus/20179/Phy1050/Studyguide .. Wright State University Lake Campus/20179/Phy1050/Syllabus .. wright.miraheze.org
Contents
 1 M 28 August 2017 (UTC)
 2 T 29 August 2017 (UTC)
 3 T 5 September 2017 Syllabus
 4 W 6 Spitball motion lab
 5 R 7 Sep ?
 6 F 8 Sep ?
 7 M 16:49, 11 September 2017 (UTC)
 8 transclusion deactivated by a nowiki tag
 9 R 7 Spitball motion lab Data analysis
 10 M 9 Sep
 11 M 11 Sep: Miraheze wikifarms
 12 T 12 Sep
 13 Wed 13 Sep
 14 Friday 15 September 2017 Miraheze wikilabs
 15 Monday 18 September Optics (for Test on Wednesday)
 16 Tues 19 September Sound(for Test on Wednesday)
 17 Monday 2 October Newton's Dark Secrets
 18 Wed oct 4 newton's cannon
 19 Thur oct 5 curve fit newton's cannon
 20 Mon 9 Oct
 21 duck migration patterns
 22 Upcoming lectures
 23 Footnotes and References
M 28 August 2017 (UTC)[edit]
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)[edit]
Attendance policy: Allowed to miss 15 days without penalty. Nominally, you must attend 60 days to get 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[edit]
Test prep: Questions 114 of second quiz Special:Permalink/1415990 has been discussed. (quiz called "velocity and acceleration"
W 6 Spitball motion lab[edit]
 Why constant tapping of the ball is equivalent to a constant force: w:Special:Permalink/798712661#Kinetic_theory_of_gases
 Physics_and_Astronomy_Labs/Uniform_acceleration_tapping_basketball_with_spitwads
 Data is here
R 7 Sep ?[edit]
F 8 Sep ?[edit]
M 16:49, 11 September 2017 (UTC)[edit]
transclusion deactivated by a nowiki tag[edit]
{{cot[[Physics and Astronomy Labs/Uniform acceleration tapping basketball with spitwads#How_Things_Work_Lake_Campus_Fall_17Hidden transclusion <sup>click to visit</sup> ]] .. click bar to see or hide}} {{#lst:Physics and Astronomy Labs/Uniform acceleration tapping basketball with spitwads}} {{cob}}
R 7 Spitball motion lab Data analysis[edit]
https://www.youtube.com/watch?v=6ukMId5fIi0
M 9 Sep[edit]
Did you get email on test postponement? What did we do Thursday and Friday?
M 11 Sep: Miraheze wikifarms[edit]
Want more?
T 12 Sep[edit]
 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[edit]
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 2^{9/12} = 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[edit]
Friday 15 September 2017 Miraheze wikilabs[edit]
Monday 18 September Optics (for Test on Wednesday)[edit]
 https://phet.colorado.edu/en/simulations/category/physics/lightandradiation
 https://phet.colorado.edu/en/simulation/bendinglight
 https://phet.colorado.edu/en/simulation/geometricoptics
 also before the next test
Tues 19 September Sound(for Test on Wednesday)[edit]
 I like this one
 https://academo.org/demos/waveinterferencebeatfrequency/
Monday 2 October Newton's Dark Secrets[edit]
 $1.50 is not too much to charge, but awkward to pay: https://www.teacherspayteachers.com/Product/IsaacNewtonPBSDarkSecretsGuidedViewingQuestions1703344
 Copyrighted and not right for college, but available at https://wwwtc.pbs.org/wgbh/nova/education/activities/pdf/3217_newton.pdf
Summary of transcript[edit]
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? 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[edit]
File:Bisection_method.svg and wikipedia:Bisection method and Newton's cannon " 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[edit]
 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 curvefitting and PhEt leastsquaresregression
Procedure:
 Measure distance "as crow flies" for v = 1000 and 4000 m/s.
 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
 Measure and calculate Big/Small and also percent error. The latter is (Measured−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).
 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.
 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[edit]
 #Newton's_cannon_alarm_clock
 https://www.ndeed.org/EducationResources/HighSchool/Radiography/hs_rad_index.htm
duck migration patterns[edit]
Upcoming lectures[edit]
Resonances in a violin, viola, cello[edit]
 http://acousticstoday.org/supplementarytextviolinacousticscolinegough/ 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[edit]
 Goal: Find the socalled "parabolic" curve File:Kepler_orbits.svg. Or more precisely, be able to predict periods for nearparabolic 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
v t 6100 3m00s 6200 3m32s 6300 6m25s
Newton's_cannon_alarm_clock[edit]
Data taken in classroom: timer ◊ cannon
v t 6300 6320
Phet photoelectric lab[edit]
 https://phet.colorado.edu/en/simulation/legacy/photoelectric
 https://phet.colorado.edu/en/simulation/legacy/photoelectric
Test 3 global warming links[edit]
 Estimates of rise
 nationalgeographi.com (google) Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880.
 Summary of findings  Muller (berkeleyearth.org)
 Muller lectures: