Recent content by kishtik

I have an Asus which leaves parts (screws etc) around when I lift it from a table...

Hello. I'm trying to find the individual contributions of carbon atoms to the charge carriers in graphene. In other words, I'm trying to answer "How many charge carriers does one carbon atom supply?" Here is what I've done so far: Taking the max. carrier density as 10^13 1/cm^2 and the...

Ok, this is what I got: Kirchoff's Rule: Bhv - q/C - IR = 0, and Newton's 2nd: (dq/dt)hB = m(dv/dt). Substituting v from the second eq. I have: Aq = dq/dt, where A = (h^2 B^2/mR) - 1/RC. Now, the solution q(t) is (q_0)exp(At), which goes to infinity with increasing t... Where is my mistake?

Sorry, I was too sleepy :) I can see that I = Bhv/R when the capacitor is not charged and fully conducting. When it is charged to q = CBhv, it will block the current. How can I reach dq/dt from this?

Homework Statement Assume that a metal bar of length h and mass m can slide on a rail without friction. The rail completes the circuit through a capacitor of capacitance C. There ia a uniform magnetic field of magnitude B, perpendicular to the plane of the circuit. Assume the resistance of the...

220Vrms @ 50Hz

I think the equation should be y=a(x-h)^2+k Since (-3,1) is the vertex h=-3 and k=1 we get y=a(x+3)^2+1 If x=0 and y=0 9a+1=0 a=-1/9 y=1-((x+3)^2)/9

I hope you're right, but we may be witnessing a new nuclear race... India, Pakhistan, Korea and Iran... And pay attention to the Middle East...

Dumm dumm dumm dumm...

If there are 4 ways to get to City Leu from where you are, and 2 ways from Leu to Asp City, how many ways are there to get to Asp? Think about multiplying the combinations.

Also you can try WorkingModel, it's fun.:smile: http://www.design-simulation.com/" But as stated, if you have some time to learn Matlab, consider doing it.

It does. :smile:

Thank you! That was just what I was looking for. But now I have another problem... I modified the code to: [SIZE="2"]t=input('Enter t0:'); y=input('Enter y0:'); h=input('Enter step size h:'); n=input('Enter number of steps n:'); k1=input('Define f(t,y) in single quotation marks:')...

Yes, and that symbolic expression should be used to compute the next k's in every turn of the loop.

Of course, but the value of k1 is evaluated and assigned at the line k1=input('Define f(t,y):'); before the loop and the information about the function which should be used to evaluate k's is lost... How can I change it so that it actually evaluates k in the loop using the input k1 as a formula...