Recent content by 0338jw

Homework Statement Two long thin parallel wires 13 cm apart carry 25A currents in the same direction. Determine the magnetic fild at point P 12 cm from one wire and 5 cm from the other.Homework Equations B=mu/2pi * I/rThe Attempt at a Solution I have already solved this problem, and I have the...

Thanks, but I got it in school today. Wasn't very hard, but took a bit of algebra and vector addition. Thanks anyway!

Homework Statement Determine the electric field E at the origin 0 in fig 16-56 due to the two charges at A and B. b.) Repeat, but let the charge at B be reversed in sign. I can;t find the figure online, so I'll have to describe it. Charge A is on the vertical axis distance L from the origin...

Thank you VERY much for your help! Turns out I did have the right answer (-162.89) and i just needed to add the initial temp. again, thanks for the speedy reply and consistent help!

I solved for T, and I got -189.97. Do I need to plug this back into anything for the change in temperature? Is my T correct?

I'm sorry I'm still a little confused. With the equations thatyou gave me, do I solve for the second change then plug that in and solve for T? Again, sorry if I am not picking up the hints immediately. I'm not one to complain but i do have quite a bit on my plate for the next two weeks..

I did use the first equation. Is the algebra correct from the other thread, because i tried that method as well and i still did not get the right answer. Was I correct in setting the second equation equal to the other side? I did my algebra differently from the original thread and got closer to...

Homework Statement A brass plug is to be placed in a ring made of iron. At 20 C the diameter of the plug is 8.753 cm and that of the inside ring is 8.743 cm. They must both be brought to what common temperature in order to fit? What if the plug were iron and the ring brass? Homework...

so when I find mass per unit length using mass per unit length and density I get 1.39 kg/m. I solved for frequency and I got .063 Hz. When I used wave equation for speed with 2* 620m because it had to go back and forth I get 78.12m/s. Is this correct? I'm going on to find the tension using this...

Homework Statement a ski gondola is connected to the top of a hill by a steel cable of length 620m and diameter 1.5cm (r=.015m) As the gondola comes to the end of its run it bumps into the terminal and sends a wave pulse along the cable. It is observed that it took 16 s for the pulse to...

I checked the sines but I keep getting the same thing. Should I be using the angles on either side formed by the FG pulling the center of gravity down? As you can se I'm using 17.53 (angled formed by his fet atthe ground) and 72.47 from the right side of the mg. Which angles should I use?

I tried doing this, but the torques do not equal out. I have Tcw=mgsing72.47*.42m= 294.36 Tccw=mgsin17.5*.996=220.5

So my sum of torques \Sigma\tau= Fn-mgsinR +Fn -mgsinr Should I have two sum of forces in the y direction to find each normal force? I'm sorry, but I'm not getting that sum of the torques. Would i be able tosolve for each individual one? Will I need to multiply each normal force by the...

Are the sum of the forces in the y direction FN-mg*sintheta*r+ FN -mgsintheta*r2? My axis is the center of gravity since i need both normal forces.

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