Recent content by robert25pl

Can you help me find frequency response for the system. Thanks h(n) = (a)^n*cos(n*pi)*u(n)

Since this is open pipe wavelength = 2L/n frequency f1= nV/2L and 2*f1 is this ok?

Can somebody help mi out to understand more this problem. Open at both ends tube with variable length and vibrating tuning fork is helded near one end. Lenght is .5 meter when the sound intensity is maximum. Find wavelength of sound, tuning fork frequency, and frequency which produce...

So all the values should be the same but with opposite direction. For phase should I used any number as long I get sin and cos after adding them up?

I have to find the signal if x(n) = nv(n-1) for -infinite < n < + infinite x(n)+x(-n) Can I get hint with this problem so I can do rest of them. Thanks

I have two waves in a string. One of them is given below, where x is in cm and t is in seconds. y=40cos\frac{\pi}{4}\((0.5x-4t-0.4) I have to find second to produces standing waves when added to the first wave. I know how to add two waves were they are given. Can I get hint on this one...

Any help with this problem. Its due today. Thanks

Given E=J_{so}cos(\omega t-\beta z) \vec{i} and H=\frac{J_{so}}{2}cos(\omega t-\beta z) \vec{j} I have to find power flow density vector(this i know is a P=ExH pointing vector the power) the dissipated per unit volume, the electric field energy density, and the magnetic field energy...

\psi=\int_{s}B\cdot\,ds=\int_{x=1}^{4+5t} \int_{z=0}^{5}\frac{10}{x}cos100t\vec{j}\cdot\, dx\,dz\vec{j}

Yes I can do that and then find emf.

Can someone check my equation for flux. Thanks A rectangular loop in the z-y plane is situated at t = 0 at the points (x=1,z=0), (x=1,z=5), (x=4,z=5), and (x=4,z=0). The rod of the loop with end points (x=4,z=0), and (x=4,z=5) is moving in the x-direction with a velocity v=5\vec{i}m/s while...

If current densities are given in a perfect dielectric medium having \epsilon , \mu I have to find the power dissipated per unit volume, the electric field energy density, and the magnetic field energy density everywhere. Can I get help with equations?

In the region of space \epsilon_{o} , \mu_{o} E = (6z\vec{i}+10y\vec{j})cos500t \vec{j} Find B, \rho, J

Thanks, So in my problem I will get J not equal 0

I think I got B, D, H and \rho and using \nabla \times H =J+ \frac{\partial D}{\partial t} I get J What is the difference between free space (J = 0) and vacuum?