Hi, I've attached the problem and the solution. I understand the solution except for one thing. I've circled the part I'm having problems with. How do I decide if the circled part should be
f2(x,y,z)=x2-y2-z or
f2(x,y,z)=z-x2+y2
I'm sure it has something to do with the fact that the problem...
So in this case, since they are in parallel as you say, Ceq=((n-1)ε0A)/d. But if they were in series I would say:
1/Ceq = (n-1)(1/((ε0A)/d)) which equals
Ceq = (ε0A)/(d(n-1))
And they would only be in series if all the plates are connected only by one rod? Also, I don't quite understand your...
Thanks, I was also wondering why is it that its wrong to model the capacitor as many capacitors in series. So for example, the 8 plate capacitor in the picture could be modeled as four two-plate capacitors in series. Why is it that I should add the capacitances as if they were in parallel? Am I...
Homework Statement
A variable air-filled capacitor of the type used in tuning radios
is shown. Alternate plates are connected together, one group
fixed in position (shown in dark grey), the other group capable
of rotation (shown in light gray). Consider a pile of n plates of...
Homework Statement
A heavy stick of length L = 3.3 m and mass M = 20 kg hangs from a low-friction axle. A bullet of mass m = 0.014 kg traveling at v = 117 m/s strikes near the bottom of the stick and quickly buries itself in the stick. Just after the impact, what is the angular speed ω of...
That's what I thought but everything I could find online has me calculating the PE from the unstretched position without taking into account gravitational potential energy. I guess all the sources I found were wrong then! Kudos
Homework Statement
A mass of 0.5 kg hangs motionless from a vertical spring whose length is 0.90 m and whose unstretched length is 0.45 m. Next the mass is pulled down to where the spring has a length of 1.15 m and given an initial speed upwards of 1.4 m/s. What is the maximum length of the...