Recent content by xchococatx

Well basically I'm thinking that a capacitor stores charges (or energy) so, onces its all charged up by a battery, I don't see how it could lose those charges...even when the battery is disconnected. (immediately anyways, it wouldn't be all gone I don't think) Why I was thinking about this was...

If there is a parallel plate capacitor, connected to a battery, which is then disconnected, there is NO voltage now, but "Q" (charge) on the capacitor remains the same. YES OR NO? I think yes.

the human voice...?? Homework Statement The problem asks to explain the physics involved when humans are speaking. and by speaking i mean a normal loudness, casual talking to friends kind of speaking. Homework Equations Not sure if there are relaly any equations to this one...but maybe...

Thanks for everybody's reply. air resistance would be very important at the height falling from 3 km because we would assume that at somepoint the terminal velocity would be reached (air resistance=gravity?) and so therefore g would be constant?**clarification, by constant g, i mean that it will...

Sorry for being vague, he is falling out of the sky at an altitude of about 2 kilometers...where the stratocumulus clouds are.

Why wouldn't Newton's law of gravity not needed, wouldn't it be a good way to describe the relationship between the human and the centre of the Earth (earth is pulling him towards)? I'm looking up terminal velocity right now, personally haven't learned that yet, but might get some brownie...

Homework Statement Basically, i was told to describe the physics involved with a person who just happens to be falling out the sky...However, I'm a bit overwhelmed as to where i should start off Human mass: 54kg Earth's gravity: 9.8m/s^2 Air resistance:?perhaps negligible or would that...