Steps to calculating capacitance
1. Imagine the capacitors are charged to +Q and -Q
2. Use Gauss' Law to find the electric field between them
So we know from the derrivation in the previous post that the electric field between two parallel plates with +Q and -Q (or and ) is:
Because we did the derrivation for the this in the previous post we can skip steps 1 and part of step 2.
For a while i have been trying to make a blog with every one of the equations that we use. and then people can post comments with the ones that i am missing - and i'll edit it (or if that isnt a setting, mr. fullerton could) so that we can make a colaboration of every possible formula to study from. I was planning on doing this before midterms... but the equation editor would not work for me. its working now though... so here it goes (im sure i will miss a ton but its worth a shot)
(First off, I know Mr. F probably has this derivation on the course notes, but I figured it would be great practice to write it out, and also people might be more likely to look at it if it is typed out.)
We just started Electricity & Magnetism in Physics C, and right off the bat the difficulty is enormous. Now I understand why college engineers always complain about electrostatics. At the moment we are derriving the electric field on a point charge, from uniformly charged objects. We've
Right now in physics we are studying Rotational motion and torque, but since I already made a blog on that last week, I decided that this week I would create a post about music.
A few months ago my girlfriend asked me why certain harmonies sounded good to your ear and why some of them sounded bad. I just assumed that it had something to do with the fact that we grow up hearing certain harmonies in our music, and in other cultures where they might not listen to the same music as us, the harmon
This week we did an independent unit on Impulse and Momentum (I like to call them Jimpulse, cause Impulse's symbol is a J, and Rhomentum, because Momentum's symbol is a Rho which looks like a p). In other physics classes, we were told that impulse equals momentum, but in Mr. Fullerton's Physics AP-C class we did a lab and a few worksheets that proved just that!
In a lab we did this week we used a force and velocity sensor, and pushed a cart on a track connected by rubber band to the force se
Moog is the leading producer of synthesizers in the world, I would guess. For every concert i have been too, the staple instruments for the piano player are a hammond B3 organ (with the leslie speaker ofcourse), and one or more Moog brand synthesizers.
Well, we all love the theremin, and Moog just created the first polyphonic theremin. Many have tried, and all but Moog has failed. Apparently, when you put 2 theremins in the same room, they dont work, or you get alot of feedback with eacher,
Gauss' Law is a topic that we covered in Physics-C that was pretty much completely new to us. We didn't talk about it about all in Physics-B, so it's one of the harder things we have to do in Physics-C this year.
Because of this, for myself and for others, I want to type up some of the derrivations and notes so that its fresh in my mind and can maybe help some other people who need it!
The equation to remember:
When you have a conducting sphere with uniform charge Q an
The past week or two we studied rotational motion in our AP Physics-C class. So far, it has proved to be the most difficult unit, and one of its sub-units, angular momentum, is one of the hardest topics that physics-C will cover. Rotational motion has kinematics, dynamics, and energy worked into it, but with a twist(ha!).
If you can remember your equations from kinematics, energy, and dynamics, the equations for rotational motion are all similar, except there are some variables you need to s
It seems that everytime you learn something knew, it becomes obvious in every day life. I swear everytime I learn a knew word, I'll hear 10 people use it that day, when I've never even heard that word used once before.
Well that seems to be happening with Simple Harmonic Motion. Even though we did a whole unit on it last year, I'm just starting to notice SHM everywhere now. What sparked this thought was that I just set down a bowl on top of a smaller bowl, and it rocked back and forth for ab
So today was our first day of Electricity and Magnetism in Physics-C. I've been anticipating this heavily, since I applied to college as an Electrical Engineer, and i want to see what E&M is like using calculus. It should be fun.
Now that we've summed up all of mechanics (at this level), everything seems pretty straight forward. For the most part, physics -C is just an advanced physics - B that involves a bunch of calculus and a couple completely new topics like everything that has to d
In physics-C this week we started (re)learning about gravity, potential energy due to gravity, orbits and keplers laws, and escape velocity. I figured I would talk about the different popular modern physics theories and there views on what causes gravity.
We all know that gravity exsits. If you drop something, it falls to the floor. If you jump, you come back down. It's easy to see that gravity pulls you towards the center of earth. But WHY?
No one knows for sure! But, over the summer I re
With mechanics being rapped up, its about time to try and pull everything together. In our class we do these drills called "4 minute drills" where we have 4 minutes to write down every single equation that we know. If you can rattle off equations mindlessly, then it probably means that you know how and when to use them, and you will always have the right one to solve the problem.
Since in our 4 minute drills we never actually get all of the equations we know so far... I thought it would be a
My little brother showed me this. It's a little website with stupid little physics cartoons. some of them are really dumb but some of them are pretty funny. Check it out - a lot of them will make you laugh!
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