Recent content by Bobbadillio

Hmm, well, you also need to know if they're conductors or not. If they're not conductors, all bets are off when calculating charge. Regardless of conductivity, we need to know more about the geometry of the situation. Outside of the context of capacitors, the only relation between charge and...

There's a good chance fire won't solve this problem. If the pen conducts heat well enough, it might prevent the paper around it from burning by conducting the necessary heat away from it.

The shape of the object definitely has an impact on the charge. Consider parallel plate vs. cylindrical capacitors. You might expect that the expressions for capacitance would be similar for the two, since if the difference between A and B is very small, the dielectric will be very close to a...

There are a few relations between charge and voltage. Usually, we just say that Charge=Capacitance*voltage, but that doesn't seem to be what you're looking for, since you're saying ignore capacitance. That makes things harder, since it requires you to consider the field of all of the charges...

Current is equal to voltage over resistance, so how do you calculate voltage? do you know the current that's flowing?

The sun's surface temperature is not an upper limit. The upper limit on power derived from the sun is the power output of the sun. In the case of the lens, the upper limit of power applied to the piece of area in question is the power passing through the lens(actually, it's probably less than...

I've noticed that plastic cups exhibit some interesting physical behavior. Some paper cups(maybe all actually, I'm not sure) have concave bottoms, and when the liquid in the cup gets high enough, the forces from simply raising the beverage from the table to my mouth create enough force to pop...

You have to allow one of the variables to be arbitrary, and then solve for the rest of them in terms of the arbitrary variable. This will give you a set of solutions, which are known as the "solution space"

My advice remains, work is force times a change in distance.

For number 3, remember the definition of Work. Force times a change in distance. That should be enough, if I'm reading the problem right.

yup :)

This only works if you assume the Generalized Continuum Hypothesis. :)