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Hi everyone. My nephew wants to use the site so he is asking a question for the first time.

Here's the question:

It takes 7 hours for 2 workers to perform a certain construction job. How long...

Hello all, I have a capacitor problem that I can't seem to get a handle on. Maybe someone out there has some ideas.

Ok... you have an AC source. It provides 25V (rms) with frequency of 580 Hz.
...

Since this is an old post I'm going to be brief. If you see this and want more detail you can let me know.

a) The truck's speed has to be: 200*cos(42) = 148.6 km/hr

b) The vertical comp. of...

Do you know anything about the circle?

How about you try using op-amps? Like a comparator; one for the low end and one for the high end.

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Ok, now it makes a little more sense. Thank you.

:)

Ok... if the pipe is totally filled with water as it exits then you can say that you have a 'disk' of water with area (a) = (pi)r^2

r = radius of the pipe = (8/2)" = 4" = 1/3 ft (need to keep...

Ok... what do you mean by a touch-sensative strip? Go into a little detail so folks here know what you're asking.

Hello...

Here's what I recommend if you are bent on doing this. Simply do a search (Google) for "spark gap", or "noise generators", or some variant thereof. You will find many hits for this....

Hello...

Sounds interesting. I'm only guessing here, but try looking up "humingbird moth" and see if that looks like what you saw.

f-

You need a BIG noise generator... like a spark gap of some kind. Could involve some danger playing with high voltage though.

Hello Amir...

What is the c:|z| = 1/2 about?

Hi Sarah....

I'm usually pretty good about checking my mail. I'm a physicist....I may be able to help you out. Let me know if you're interested.

fiz~ :)