# Recent content by rjs123

1. ### 3-input AND - NAND equivalent?

i figured it out thanks to oxygen's logic...I checked all 32 combinations for all the letters related to the problem...and all of the outputs came out correct. final condensed form: c(de + da + ab) + b(ae + de) heres my diagram:
2. ### 3-input AND - NAND equivalent?

original form: ##ab \bar ce## + ##b \bar cde## + ##cde## + ##abc## + ##acd \bar e## condensed form: ##b \bar c(ae + de)## + ##c(de + ab + ad \bar e)## partial circuit diagram using NANDS ##c(de + ab + ad \bar e)##: I made that portion with 7 NANDS...I still have to finish the ##b \bar...
3. ### 3-input AND - NAND equivalent?

I changed the above post...it should be tilde symbols ~ for "not".
4. ### 3-input AND - NAND equivalent?

thank you. I have one more expression for practice problems: ab~ce + b~cde + cde + abc + acd~e (The ~ symbol represent "not") I'm supposed to do this expression in 12 gates. I currently have the last 3 condensed to: c(de + ab + ad~e) The first two: b~ce(a + d) so the final...
5. ### 3-input AND - NAND equivalent?

Here is what I got....this is a practice problem to prepare for a midterm, but I would like to see how you used 6 NAND gates. http://img827.imageshack.us/img827/7766/schematic.jpg [Broken]
6. ### 3-input AND - NAND equivalent?

I'm trying to convert this expression: ga + za + sgz using just 2-input nand gates...more specifically the 7400 ic chip. I'm trying to use as little NAND gates as possible. I've got (ga + za) down to 5 NAND gates currently...I can only use 8 total NANDS for this.
7. ### 3-input AND - NAND equivalent?

Homework Statement I'm trying to convert the 3-input AND gate shown below using only NAND gates...but am having troubles. Is it possible to use only 2 NANDS for the conversion? http://www.doctronics.co.uk/images/4081_03.gif [Broken]
8. ### Building a solenoid need advice

I'm intending on creating a solenoid that will project a bb for a class project. I'm using a flash capacitor from a disposable camera as my current source. Here is my question...what is the best "setup" for the solenoid to increase the magnetic force on the bb without increasing its current...
9. ### 2-d kinematic w/non-constant acceleration

yes, the force applied depends upon its position since we are dealing with electromagnetic force. It seems without an equation given...I would have to calculate the variables separately per second, which won't be as accurate.
10. ### 2-d kinematic w/non-constant acceleration

Homework Statement I'm not sure how to set up the differential equation. I've got 2 point charges...both positive. One charge is fixed in position (0, -250m)...the other is travelling at an initial speed in the -x direction (10,000m, 0) with 0 acceleration. At time t=0, I calculated the...
11. ### 2-d kinematic question

thanks i see how to do it now.
12. ### 2-d kinematic question

Homework Statement Lets say I have a .5kg mass traveling at 1200 m/s in the -x direction with 0 acceleration. The force applied to this mass is (2.3i + .093j)N. I have to find position, velocity, and acceleration at say 1 second after the force is applied. No gravitational force involved...
13. ### Kinematic question

yeah i see what i did...thanks.
14. ### Kinematic question

nevermind i got it.
15. ### Kinematic question

Homework Statement A water balloon takes .22 s to cross the 130 cm high window, from what height above the top of the window was it dropped? The Attempt at a Solution I'm using: v^2 = vo^2 + 2a(x - xo) v = distance/time v = 1.30 m / .22 s = 5.91 m/s (5.91 m/s)^2 = 0 +...