# DivideByZero

Senior Members

85

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• Rank
Meson

## Profile Information

• Interests
creating theories
• Favorite Area of Science
astronomy, physics, computer science
• Biography
I am a scholar.
1. ## Electric Circuit Logic

Oh My God it worked!!!!!!!!! Thank you so much Miguel!!!!! You're the best! +rep!! Thank you thank you thank you thank you!
2. ## Electric Circuit Logic

one more thing... Do I need any of the resistors? or can I just build it without the resistors?
3. ## Electric Circuit Logic

Will this be guaranteed to work?
4. ## Electric Circuit Logic

Hi, I want to make a simple AND logic gate using transistors. I found this diagram: I believe it is using 2 NPN transistors to make an AND logic gate. I've been trying to make a simple gate with two switches but I'm failing miserably. The transistor I bought looks like this: I just can't figure out where the ground end goes and how the switches are wired to the battery. Can someone please help me out? Can someone draw out a diagram including the power source for this AND gate with the two switches and a light bulb? I've tried many times but can't figure out why the light bulb won't turn on when both switches are down. :evil: thank you so much in advance. I also found this circuit board online: In that diagram I don't know where the power source comes in. Also what connects to that node in the bottom right?? Help!
5. ## Too many variables!

oh so i have to use E=V/d and add the vectors...
6. ## Too many variables!

electric field: E = F/q E * q = F (480)(q) = F holy s*** thanks for that hint! Merged post follows: Consecutive posts mergedOK so here is what I've done so far: F_g = m*g = (0.00004kg)*(9.8) = 3.92e-4 F_e = E*q = (480)*(q) F_t = m*g*cos(20) = 3.684e-4 F_g + F_e + F_t = 0 ... q = 1.58e-6 is this right?????
7. ## Too many variables!

This is a hw problem so please explain your process instead of telling me the whole answer, thanks! There is a conductive ball hanging from a string in a electric plate. As you can see its slightly tilted toward the negative end. mass of ball: 0.04g potential difference: 480V separation of plates: 0.06m angle of string hanging: 20 degrees the question asks: What is the charge of the ball? I drew a free body diagram of three forces. one: force of tension two: gravity/weight three: force of charge pointing towards the right I think I'm suppose to add up the three forces to equal zero. F1 + F2 + F3 = 0. I think F3 should use the formula ©(q1)(q2)/(r^2). Am I right? If so then what is r??? I'm so lost in this problem please help guys!
8. ## Earth's Magnetic Field - Why?

Don't you first need an electric current?
9. ## Earth's Magnetic Field - Why?

Oh, how do rotating inner and outer cores create a magnetic field?
10. ## Earth's Magnetic Field - Why?

Does it just exist? Any precise reason? Why is there a magnetic field on earth?
11. ## Light enigma

I guess what I'm talking about is that it blinks on and off as fast as theoretically possible. Maybe on then off then on at Planck's time constant (smallest unit of time). If the light was on and suddenly, within the smallest unit of time, it blinks off then on again, we wouldn't notice it. And same thing the other way. If the light was off and suddenly, within the smallest unit of time, it blinks on then off again, we wouldn't notice it. So what happens if it blinks on and off repetitively as fast as possible?
12. ## Light enigma

If light were to blink on and off and the speed of light continuously, would the light appear to be on or off?
13. ## electric current (AND, OR, XOR, NOT)

Oh my! Thank you guys so much!!!!
14. ## electric current (AND, OR, XOR, NOT)

Well, I'd like to build my own as oppose to buy one. How hard can it be to build an OR gate anyways? I'm mainly doing this for educational purposes. Once I get used to it, I might start buying pre-made logic gates. I really want to make my own! Help!
15. ## electric current (AND, OR, XOR, NOT)

How can I make AND, OR, XOR, and NOT logic gates in an electric current. The power source could be a battery and I can connect parts using a copper wire. But how can I make these logic gates? Whats the simplest way?
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