Phy122_0914

# Phy122_0914 - Physics 122 Sept 14 2010 Remember that there...

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Physics 122 Sept. 14, 2010 Remember that there will be clicker questions relating to your first lab (this week) on Thursday. Some people have asked me about the calendar where labeled the days 15 1 15 2 16 1 16 2 Those aren’t I labeled the days 15.1, 15.2, 16.1, 16.2. Those aren t section numbers (we also covered 15.3, 15.4, …). To clarify, I have changed to “1 st half of Ch. 15,” “2 nd half of Ch. 15,” etc. Chapter 16 assignment is due tomorrow (Weds.) at 5:00 PM. Start to look at Sections 17.1 – 17.4, especially the examples. Question 1:

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Are you aware of the course blog? It doesn’t seem to be etting the traffic I expected getting the traffic I expected. www.phy122help.blogspot.com. Good example: Hi, I am still struggling with question 3 part b with the (1.50cm, 0) coordinate! (A 3.5 μC harge is located at y = 1.40 cm, and a - .26 μC charge is located at y=- .60 cm. ) I charge is located at y 1.40 cm, and a 2.26 μC charge is located at y 1.60 cm. ) I did sqrt(1.6squared+1.5squared) to get 2.19cm for the bottom charge. For the top charge, i got 2.05cm. Then I applied these dimensions in meters to V=ke q/r and added the two electic potentials to get 4.46e5 as my answer! ad example: Bad example: Anonymous said. .. Chapter 16, question 8. I think something is wrong when you submit the answer, because I figured out the problem and know how to do it, but it keeps marking it wrong when I know the answer is right. I did the "Practice Another Version" and when I entered the answers for that similiar question, it was marked right, however, on the actual I calculated the same exact way as in the Practice Version, and I keep getting it marked wrong! I thought it may be due to rounding and tried several techniques (round it to 2 decimal places, then tried rounding it as 1 whole number). .still it's wrong and I know the answer is correct. Can someone help? September 10, 2010 6:13 PM Anonymous said. .. Nevermind, I figured it out and was able to get it marked right ;)
Course instructors are holding their office hours in the help room – A-131. Prof. Stephens: Tuesday & Thursday, 12:50 – 1:50 rof Koch: Friday 10:10 :20 Prof. Koch: Friday, 10:10 – 12:20. We have an experiment to give you videos with step- by-step solutions of selected homework problems. You can access via Blackboard Course Documents.

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or any distribution of charge the --- - For any distribution of charge, the potential V( x ) can be found by adding contribution from each h ++ + - - charge. + + + + x
One special case: A spherically symmetric charge distribution produces V ( r ) = k e Q /r here measured from the center where is measured from the center of the sphere, and Q is the total charge on (in) the sphere. It looks like all of the charge is concentrated at the center. rue for solid sphere or True for solid sphere or spherical shell. You already knew this because the field is the same outside a sphere as or a point charge at center for a point charge at center.

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Phy122_0914 - Physics 122 Sept 14 2010 Remember that there...

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