Recent content by j-e_c

Thanks for the quick reply. Note - I'm going to change theta to x so I can avoid LaTeX complications. Similarly, I'm going to change lambda to a and lambda-prime to b. First, I rearranged the equation to make cos(x) the subject: (b - a) = h/mc (1 - cos(x)) (b - a)mc/h = 1 - cos(x)...

[b]1. A photon of wavelength 1.000nm is scattered by a muon initially at rest. What is the deflection angle of the photon if its wavelength after scattering is 1.001nm? Homework Equations \lambda^{'} - \lambda = \frac{h}{mc} (1 - cos(\vartheta) Assume that the mass of the muon is 200 times...

It's OK, I've solved it now.

My lecturer said that a standing wave is formed when two waves that travel in the opposite have the same frequency. He said that if the waves are y1 and y2, then the resulting wave y can be given as the sum: y = y1 + y2. y = Asin(\omegat - kx) + Asin(\omegat + kx). (1) Where the...

I've tried looking on various websites to find a definition I can understand but every website describes it differently, even the online dictionaries. I have also tried looking in my Y&F University Physics. I just don't <i>understand</i> what elastic hysteresis is because most descriptions don't...

I have no way of knowing. This question is from a university past paper for which there is no mark scheme. That's why I posted it here really.

OK, I've got it, thanks RoyalCat!

Thanks, for your reply. Here is my second attempt: dP = - \rhogdh \frac{dP}{dh} = -\rhog \int\frac{dP}{dh}dh = \int-\rhogdh P = -\rhoGM\int\frac{1}{r^{2}}dh between 10000 and 9950 P = -\rhoGM [\frac{1}{r}] 10000...9950 = -\rhoGM [\frac{1}{10000}-\frac{1}{9950}] =3.14x10^{31} Pa I...

Homework Statement Assuming a neutron star is made from an incompressible material, what is the hydraulic pressure 50m below the surface? Mass = 1.98x10^30kg Radius = 10km 2. The attempt at a solution g=GM/r^2 = (6.67x10^-11 x 1.98x10^30)/ 10000^2 = 1.32x10^12 m/s^2 P=P_{0} + \rhogh Pa...

Homework Statement A wooden door is closed by applying a perpendicular force to it. If the magnitude of the force is constant and takes 2 seconds for the door to close, how long would it take to close the door with the same amount of force, in the same manner, if the door was made of a...

Homework Statement A gyroscope consists of a solid disk of diameter 1m and mass 100kg mounted on an axis passing through the center of mass of the disk. (a) Calculate the moment of inertia of the disk about its rotational axis. (b) What is the kinetic energy of rotation of the disk if its...