Recent content by lwelch70

No help?

Anyone?

Homework Statement A closed system initially at rest on the surface of the Earth undergoes a process for which there is a net energy transfer to the system by work of 200 Btu. During the process, there is a net heat transfer from the system of 30 Btu. At the end of the process, the system has...

Anyone have any ideas?

Homework Statement 1) Calculate the value of B_z needed for an electron with a speed of 6X10^5 m/s to be deflected to the right in acirle of radius 3cm. 2) Calculate the value of E_x needed for an alpha particle with a speed of 6X10^5 m/s to be deflected to the right in a circle of...

Oh wow. Haha. Okay guys I figured it out. It wasn't nano Coulomb it was micro. Got the answer on the last try.

Homework Statement Three equal point charges, each with charge 1.95 nanoC , are placed at the vertices of an equilateral triangle whose sides are of length 0.550m . What is the electric potential energy of the system? (Take as zero the potential energy of the three charges when they are...

Okay, I pluged them back in and solved t to equal (7/2). I'm at a brain block and now do not know what to do with this. Please help. It's due in less than an hour. I feel like I'm right there but just can't get it to click.

LCKurtz, is there a way we could IM? I set the second set with an "s" -5+2t = 3+4s solved for s = -2+(1/2)t Do I then plug that in for the s in the original to solve?

-5+2t=3+4t solved for t to equal -4 5+t=4-8t solved for t to equal -1/9 I'm not really sure if I went about that right but I'm stuck.

Anyone else have any help?

t=-4 for i and t=-1/9 for j

So I've been trying to set the i value of L1 to theat of L2 and likewise for the j value. I can't seem to get the answers though. I solve for the variable (in L1's case "T", correct?).

I'm sorry but could you walk me through this step?

L1: r(t) = (-5 + 2t)i + (5 + t)j L2: r(t) = (3 + 4t)i + (4 - 8t)j I know that they are perfendicular but how do I go about finding the point of intersection?