Recent content by Rick2015

The thickness is the critical radius of insulation r_critical = k/h. Heat = amp x volt

It heats the wire. Friction is involved but to this problem it is not take in consideration. The length of the wire determine the current flow.

To protect the circuit, right?!

Homework Statement A copper wire has a diameter of 204.3 mil (1 mil = 0.001 in) and a resistance per unit length of 8.31x10^-4 ohm/m. The wire is coated with plastic insulation with thermal conductivity k = 0.20 W/(m K). The upper temperature limit of the plastic is 400 K. The air surrounding...

B = hbar^2 / 2 I

Ok. Thanks So B = hbar/2I And for the angular momentum: Lz = Mj hbar but if J = 1 ; M = -1, 0, 1 right? lost again? because if I just use 1 I will have Lz = hbar

The bond distance for HCl is 1.29 A. At the lowest rotational state the energy is zero. What is the energy and angular momentum Lz corresponding to the first nonzero rotational state? I m not sure if I am approaching this problem right. first I did 1.2 A = 8.3 x 10^7 cm^-1 Then I used this...

I got it! Thank you!

yes. it is the wavelength. But I am getting m^2

< Mentor Note -- thread moved to HH from the technical physics forums, so no HH Template is shown > Okay, I am having trouble with the units. I have the values for the wavenumber and I am trying to find the period. These are the formulas that I am trying. T = 1/f ; f = c/lambda example...

Thank you! That is what I thought but wasn't sure if the "fit" was a trick statement.

How many energy eigenstates can "fit" inside a one-dimension box of length L?