View source for Wright State University Lake Campus/2017-1/Phy1120/log

*<small>[[/Guy vandegrift|attend]]</small>
==Monday 9 January 2017==
*I need to fix error in schedule.  We decided to have exams on Monday, and also to meet in one long segment MW starting at 10 AM.

*Assignment:
#'''[[../|Click here to go up one level]] and click the three integers ### to get into your private miraheze account.  You will be refused until you log in with your wsul### username and your password.  Log in and click main page.''''
#Add your user name to [[Wright State University Lake Campus/2017-1/Phy1060]]. Do this by replacing _username by your username. )
#Open your private wiki account wsul### and click edit.  You will see instructions enclosed in the "hide" tags: <code><nowiki><!-- hidden text--></nowiki></code>
##replace xxx by your Wikiversity username.  This creates a link back to your Wikiversity page
##Fill in PHY1120 as instructed when y
#Create a word document called Enrollment and put it in your dropbox.  For now, it should contain only your wsul### (046-056).  Also place your noun### password so you won't forget it.
#Paste this into your Wikiversity user account 

<code><nowiki>[[Wright State University Lake Campus/2017-1/Phy1120]] - links to roster, with all important links at the top.</nowiki></code>

==16:05, 8 February 2017 (UTC)==

==16:23, 11 January 2017 (UTC) all presentS==

===16:10, 23 January 2017 (UTC)===
*Got up to [[How things work college course/Waves (Physics Classroom)]]
*Project idea at [http://www.wou.edu/~schoenfw/Old%20Courses/PH202%20Winter%202012/Solutions/PH202%20Chapter%2016%20solutions.pdf '''this site'''].  WARNING: Dropbox checks for plagiarism. BTW,  [https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=constructive+and+destructive+interference+conceptual+question '''this'''] is why we can reduce the cost of higher education by organizing all these individual efforts into a common platform using private wikis.
*[https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/constructive-and-destructive-interference don't forget that [[w:Wikimedia Commons]] supports movies]

https://www.khanacademy.org/science/physics/light-waves/interference-of-light-waves/v/constructive-and-destructive-interference

==8 February 2017 (UTC)==
===w/o crind===
*<math>P.E. = q\Delta V</math>, where E electric field is and &Delta;V is voltage
*<math>\Delta V = Ed\cos\theta = Ed</math> if d and E are parallel.  Here d is displacement.

The above formula fails if E is not constant, but over a small distance it does work.  Replace &Delta; by d and use calculus.  For a distance, r, from a point charge or a spherically charged sphere:

*<math>|dV/dr| = |E|</math> (I used absolute value signs...don't worry about minus signs because they are too complicated to keep track of)

*You might choose to not learn [[Special:Permalink/1378605]] because it is not likely to be on an MCAT.  (It teaches vector algebra)

*Project ideas:
#Neatly solve problems that were not well solved in the answer key
#Pose and solve problems in the book that look appropriate
#Explain something for students. (???)

==20 February 2017 (UTC) Is the osmotic force a "pseudo-force"?==
{{Quote box
 |quote  = What is the force that drives the molecules through the membrane? This is a misleading question, because there is no real “force” in the physical sense other than the thermal energies all molecules possess. Osmosis is a consequence of simple statistics: the randomly directed motions of a collection of molecules will cause more to leave a region of high concentration than return to it; the escaping tendency of a substance from a phase increases with its concentration in the phase.
 |source = [http://www.chem1.com/acad/webtext/solut/solut-4.html Chem1 General Chemistry Virtual Textbook → solutions → osmotic pressure]
 |width  = 70%
 |align  = right
}}
The answer is yes and no.  Wikipedia does not include osmotic forces in its article on pseudoforces.  But search the word ''pseud'' in  [https://books.google.com/books?id=1zP4bYDWq_wC&pg=PA24&lpg=PA24&dq=osmotic+pseudo-force&source=bl&ots=PTZVgL9VYC&sig=SCC9gLeh_hHBChAKmnChlvfZhRo&hl=en&sa=X&ved=0ahUKEwi-tsjgh5_SAhXq44MKHZrZA1wQ6AEIIDAB#v=onepage&q=osmotic%20pseudo-force&f=false this excerpt]] from the Google books search engine. The quote to the right is a good explanation.