# Recent content by lostinhere

1. ### Transmission line question

Z in =50-j10 Ohms i in=2 amps length = 2 meters Z0=75 Ohms u=2E8 meters per second beta=.3 rad/m How do I find I+ and I- at the input? What is the voltage at the load? Any help would be appreciated.
2. ### Converting basis vectors

I wasn't quite sure where to post this but..... Does anyone know of a good program that will convert vectors from cartesian to spherical or cylinrical. I am (tediously) doing it by hand and would like to check my work. Thanks :)
3. ### Derived the expression for voltage

never mind, I was overthinking the problem.
4. ### Derived the expression for voltage

The current in a 15 millihenry inductor is known to be: i = 4 amperes, for t < 0 and i = A1 * e -2000*t + A2 * e -8000*t amperes, for t > 0 The voltage across the inductor (assuming the passive sign convention) is 58 volts at t = 0(+) seconds. I need to find the constants a1 and a2. I have...
5. ### Node Voltage help

..................nvm
6. ### Node Voltage help

I have this much Node 1: between the 25k resistor and the 11mA source) node 2: between the 500 ohm resitor, 10v source, 1k resistor and 500 resistor and the 11mA source V1: voltage across the 250 resistor V2: voltage arcross the 1k resistor reference node at the bottom of the pic node1...
7. ### Node Voltage help

Can anyone help me find node-voltage equations for this circuit. The 10V power source is throwing me. Thanks.
8. ### Integrate sqrt(2+2sin(x)) ?

Can you be more specific please?
9. ### Integrate sqrt(2+2sin(x)) ?

Other than sqrt(2)*sqrt(1+sin(x)) I'm stuck
10. ### Integrate sqrt(2+2sin(x)) ?

I'm having trouble with this. Can anyone help me integrate sqrt(2+2sin(x)) ?? Thanks
11. ### Laplace Transform

thanks, I knew it was simple
12. ### Laplace Transform

This question may be obvious but I am stumped. I know the definition of a Laplace Transform is integration of e^(-st)f(t). However, I don't know how to integrate with both s and t variables included. If anyone could provide insight I would appreciated it.