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Results tagged with homework-and-exercises
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user 95575
Applies to questions of primarily educational value - not only questions that arise from actual homework assignments, but any question where it is preferable to guide the asker to the answer rather than giving it away outright. Please READ THE GUIDANCE IN META before asking homework-like questions.
0
votes
1
answer
138
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Static Friction limiting equilibrium
My attempt at a solution:
27-Us*m1*g = 0
(M1+M2)a=maxForce
Us*(m2+m1)*g=(m2+m1)*a
This problem also has two different answers apparently: http://www.brynmawr.edu/physics/courses/122/solutions/HW4. …
- 89
2
votes
1
answer
4k
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Work done by Electric Field vs work done by outside force
I'm confused as to the signage of the equation:
W=qv, W=-U, W=-qv?
When is work positive? When is it negative? Why is this different for the work done by the electric field vs the work done by an outs …
- 89
0
votes
2
answers
8k
views
Capacitors in a series circuit with dielectric
When a dielectric slab is inserted
between the plates of one of the two
identical capacitors in Fig. 25-23, do the
following properties of that capacitor increase,
decrease, or remain the same:
(a) c …
- 89
1
vote
1
answer
2k
views
Electric Potential for Concentric Spherical Shells
If you have a charged point ($q_1=+1$) inside an initially neutral spherical shell ($q_2=0$), how would you find the following:
(A) Potential at the outer surface of the spherical shell? Would it be …
- 89