Recent content by phystudent

I have no idea what to do...my teacher gave me nothing If you could give me a formula and tell me what things mean that would be very helpful

I need help, I have no idea how to even start? A 17 A current is directed along the positive x-axis and perpendicularly to a uniform magnetic field. The conductor experiences a magnetic force per unit length of 0:57 N=m in the negative y direction. Calculate the magnitude of the magnetic...

Thanks for the help but the homework is passed due, I tried it again and got 20.5MW

It's not working... the online homework service said it was wrong. I took the original number and the end number and subtracted them, then converted to MW and got 648.01, but that is not right apparently. Any help?

OK, this is what I have done so far. I used the .06 ohms/km and multiplied it bye 191km, to get the resistance. I also found the original power by multiplying the 1337A by the 500000V. So...I have 11.46 ohms of resistance and the original power is 6.685e8. Now I think I should plug the 11.46...

A high voltage transmission line with a resistance of 0.06 ohms/km carries a current of 1337A. The line is at a potential of 500kV at the power station and carries the current to a city lovated 191km from the power station. What is teh power loss due to resistance in the line? Answer in units...

I need help on what formulas to use and how to start this physics problem. We estimate that there are 260 million plug-in electric clocks in the United States, approximately one clock for each person. The clocks convert energy at the average rate of 3.6W. To supply this energy, how many...

The answer that I came up with was .01409, now is that in "m" or "cm", and is it the radius?

Is the answer from those numbers going to be the diameter or the radius? And if I used 1.56e-8 for the resisitivity, would the answer be in m or cm?

All i know what to do is to plug in the amperage, but i don't know where the other numbers are substituted for what letter, and i have no idea what Latex is for this equation.

Our physics teacher gaves us online homework, and he was gone on friday and it is due by midnight tonight. Here is an example problem that we are having trouble with: A copper cable is designed to carry a current of 400A with a power loss of 4 W/m. What is the required radius of this cable?