Recent content by phisci

Hi bcrowell, thanks for helping me clear up my misconceptions! I've got a clearer picture now. Thanks for taking your time to reply as well! One more thing on the invariant quantities in our universe. If I am not mistaken, they are the spacetime interval, speed of light, total mass and energy...

I was pondering about the following cases and I am wondering if gave a correct description for each case. Do tell me where I have gone wrong. Thanks! Case 1: When you travel near the speed of light and you observe a slow moving object. What do you see? -The object appears squashed (in 1...

Hi everyone, I was wondering if 2 unlike charges are placed a certain distance d apart, they will attract and move towards each other and the attractive force is given by Coulomb's kq1q2/r^2. Since r cannot be equals to zero as it would imply that the 2 charges exist as the same point in...

Hi thanks for the reply. I've tried your method but it gives back the same problem. As in the exponent of x in the numerator is greater than that of the exponent of x in the denominator. My initial approach to this was to carry out long division however I got a [81/(x^2+9)] which yields a trig...

Homework Statement Solve the integral of [xln(x^2+9)] wrt x using the tabular method. Homework Equations By parts using the tabular method. The Attempt at a Solution u: 1. ln(x^2+9) 2. 2x/(x^2+9) dv: 1. x 2. (1/2)x^2 3. (1/6)x^3 The answer for now is ...

okay noted. thanks a lot! :)

Homework Statement 2 particles are created in a high-energy accelerator and move off in opposite directions. The speed of one particle, as measured in the laboratory is 0.650c, and the speed of each particle relative to the other is 0.950c. What is the speed of the second particle, as measured...

Ah, i understand now. Thank you so much for your time and your quick response, appreciate it! :)

So my Gaussian sphere should be the sphere enclosing -q? inside the cavity? What would then be the net flux if the Gaussian Sphere is enclosing the entire cavity. The Gaussian sphere having a radius of R+\delta? Do I need to consider the induced charges around the cavity now? Thanks for the...

Hi all, I need your help with a question. Here goes, Homework Statement There is a hollow conducting sphere with a uniform surface charge density of +\sigma. A charge -q, is placed inside the cavity of the hollow sphere. What is the electric flux through a spherical surface just inside...