Recent content by rohanlol7

I have added the images properly now

Homework Statement We are asked to show that: ## \frac{d^2x_\mu}{d\tau^2}= \frac{1}{2} \frac{dx^\nu}{d\tau} \frac{dx^{\rho}}{d\tau} \frac{\partial g_{\rho \nu}}{\partial x^{\mu}} ## ( please ignore the image in this section i cannot remove it for some reason ) Homework Equations The...

Homework Statement I'm fine with the first part. Part b) is causing me trouble http://imgur.com/xA9CG5G Homework EquationsThe Attempt at a Solution I tried subbing in the solution y1 into the given equation, but I'm not sure how to differentiate this, i thought of using integration by parts...

yes i definitely do agree, i did realize that if its at a point x then a further distance of x on the other side will cancel that E field, however I'm not sure how to go around formulating that properly mathematically properly

no i didn't. So if i try and consider this, does is go like this ? the E field going from the positive plate will be -V/2d + px/e and through the left that should give -V/2d -p(d-x)/e and adding those two would give -V/d + pd/e ?

-V/d + px/e

Homework Statement 2 large plates are separated by a distance d and a space charge of uniform charge density p is placed between them and a potential difference V is applied across the plates. Find the electric field stength at a distance x fromt the positive plate The answer is -V/d...

if the speed decreases the size of the orbit decreases and it'll eventually fall into the sun ?

a satellite is in circular orbit around the sun. which requires a greater change in speed: the satellite to fall to the sun or to escape the solar system Homework Equations f = gmm/r^2 The Attempt at a Solution Calculated the escape velocity as(2 GM/R)^0.5 how do i find the speed required so...

but why should i want standing waves in this situation?

Homework Statement In the earliest circular planetary model of the atom the electron and proton orbited a common centre. The electrostatic forces alone provided the force field. However an accelerating charged body will send out electromagnetic waves and the orbiting charges would consequently...

I would have put the speed of sound as the maximum speed too, however I'm not 100% convinced.

here is the question http://www.physics.ox.ac.uk/olympiad/Downloads/PastPapers/BPhO_Paper3_2005_QP.pdf is question 2.

thats exactly what i assumed. Let's ignore U(x) and try to think about this. since the molecules speeds relative to the piston isn't changing can't we argue that the number of collisions per unit time is a constant? ( collisions of molecules with the piston ) if so, shouldn't our answer be...