that doesn't bode well for the lifetime of the batteries. I would suggest incorporating ultra capacitors, but i don't know if you have the capabilities.
only perfectly clean distilled water is a poor conductor. But explain to me how you are going to keep the plates separate using a liquid as the dielectric? your plates aren't stiff and inflexible. Quite the opposite. You've got nothing that is going to prevent the slightest pressure from...
so 10-50 nF or so? that sounds about right. You can't confirm the thickness of your paper afterall. Also, try to a apply a more uniform weight rather than some post-its and a cup. Use something like a short book.
a fish scale would be pulling only. They've got no need for pushing, so that'd be a waste of money for them to put it in. You could probably combine a fish scale with an electric kitchen scale.
The back-emf takes away from the source-emf. When you apply a voltage to a motor, it starts spinning faster and faster. Now, what causes it to eventually stop accelerating and reach a steady state? Well, the spinning rotor induces the back-emf that opposes for source-emf. Its basically...
no no no, you GET to take Electromechanics. :-)
anyways, try these
http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-641-electromagnetic-fields-forces-and-motion-spring-2005/index.htm
http://nptel.ac.in/courses/108105017/
http://nptel.ac.in/courses/108104011/
also...
i'm with sophie. you can't electrify the tree, so you'd need a wire mesh on the outside, which is much more expensive and complex than just some netting for no added benefit.
An alternative is to use drones or automated BB guns, but that is even more sophisticated.
that doesn't really make much sense to me.
If you want max airflow, then you'd be best off sizing 1 fan to be as large as possible given the motor size/power.
If you want operate several small fans in different locations, then you should have a small motor for each one. The motor is always...
its usually 2/3rds the speed of light or so. it varies by the material.
of course, that is the speed of the electric field. the actual speed of electrons is much much lower.
CPUs and GPU's are microprocessors, but not microcontrollers.
A microcontroller sort of a general purpose self-contained computer. It has its own program memory, RAM, and input/output. Microprocessors have to get that functionality from other parts of the computer.
To get a better idea...
a PLC is more of an application of microcontrollers. Its more of a complete system, with a power supply and an operating system and an easier to use interface, whereas a microcontroller is just a chip.