Recent content by Sipko

Sadly I ran out of time and I had to send in what I had yesterday, otherwise all the other homeworks I have done already wouldn't have been accepted. I know Its bad to leave things undone but I have to say that this topic can be closed now. But thanks for your help anyway.

To be more exact about my edit above, If I take the angle (between the x-vectors and the vectors heading towards the point P) how would I go about telling whether they are positive or negative? And should they all be 45°? Like: ETotal= (-7.13*104)*(cos(-45°)+sin(-45°))+...

Of course. from point P to their respective charges form a triangle. And the 45° Angle going from each charge towards the point P is quite obvious. Edit: So does it mean that all of the angles are 45°? So are all of them positive or are the angles from the -q charges towards the +2q charges...

So considering the vectors I found this: I understand that the individual vectors of each charge seem to cancel out. But I still don't quite grasp what I have to do to figure out the angles. I know it's staring me in the face... :)

Corrected 50cm to 5.0. Yes that was a typo. For my professor it is more important to understand the problem rather than the exact number. So close should be close enough. :) But for the sake of being exact here It should have been 3.53*10-2. So and if we are going to Look at directions I...

Homework Statement What is E in Magnitude and Direction at the center of the square of (fig. 3-7). Assume that q = 10x10-8 C and a = 5 cm Now I have am not well versed with vectors, I don't like them and they don't like me. I can not figure out the directions the magnitudes move in.Homework...

Ok ok just my keyboard layout does not allow me to place that sign quickly. But as long as its understood what is meant then it shouldn't be a problem. Thanks for the help. This task is done.

Yes I always forget that. So the answers would be : 0.0C = 5.65x10-21 J/K 100C = 7.7244x10-21 J/K Now it should be correct.

So I have looked into the Avogadros constant and the Boltzmann constant and I came up with this formula: Ek = 1/2mv2 = 3/2kT where k = Boltzmann constant = 1.3806x10-23, or R/NA. Where NA= Avogadros constant, and R = 8.3145 (Gas Constant) from there I go: Ek = 3/2x(1.3806x10-23)x273 =...

And there I was hoping it was a typo. But tell me, is my attempt correct? As far as I understand I found the kinetic energy of a mole right?

Homework Statement So first the task: Determine the average value of the kinetic energy of the particles of an ideal gas at 0.0 C and at 100 C (b) What is the kinetic energy per mole of an Ideal gas at these temperatures. I took the above right out of the pdf we got from our professor. I know...