# Search results

1. ### Probability wave function is still in ground state after imparting momentum

Homework Statement An interaction occurs so that an instantaneous force acts on a particle imparting a momentum ## p_{0} = \hbar k_{0}## to the ground state SHO wave function. Find the probability that the system is still in its ground state. Homework Equations ##\psi _{0} =\left(...
2. ### I Divergence Theorem not equaling 0

Why is it possible that ∫∫∫ V f(r) dV ≠ 0 even if f(r) =0
3. ### Position vector in spherical coordinates

Is the position vector r=xi+yj+zk just r=rerin spherical coordinates?
4. ### I Vector Fields

Is v(r) ≡ v(x,y,z)
5. ### Question about the Dirac Delta Function

Homework Statement Find the Fourier spectrum of the following equation Homework Equations ##F(\omega)=\pi[\delta(\omega - \omega _0)+\delta(\omega +\omega_0)]## The Attempt at a Solution Would the Fourier spectrum just be two spikes at ##+\omega _0## and ##-\omega _0## which go up to infinity?
6. ### Phasor angular velocity for a triangle wave?

What would the angular velocity for a phasor be for a triangle wave? I think it would vary sinusoidally but I cant find an expression
7. ### Maximum Kinetic Energy from a Physical Pendulum

Homework Statement Determine the maximum kinetic energy of a uniform rod of mass 0.5Kg and length 0.75 that has an angular displacement of 5 degrees. Homework Equations y = rsin (x) where x is the angular displacement The Attempt at a Solution Using conservation of energy ETotal = EMech +...
8. ### Disintegration Energy of Beta Plus Decay

Homework Statement The radionuclide 11C decays according to 116C → 115B + e+ + v Show that the disintegration energy is given by Q = (mC - mB - 2me) c2 Homework Equations Q = (mi - mf) c2 The Attempt at a Solution [/B] Q= (mC - mB - me) c2 Im probably missing something obvious but I can't...
9. ### Relativistic Centre of Momentum Frame

Homework Statement A partical of mass m ha speed 0.546c relative to inertial frame S. The particle collides with an identical particle at rest in the inertial frame S. Relative to S and in terms of c, what is the speed of S' in which the total momentum of these particles is 0. Homework...
10. ### Implicit Differentiation z=f(x/y) meaning

Mod note: Moved from the Homework section 1. Homework Statement This might seem like a stupid question but I'm unsure what z= ƒ(x/y) means? I'm not sure how I would find ∂z/∂x , ∂z/∂y just from this statement either. Thank you Homework Equations The Attempt at a Solution
11. ### Elastic collision between alpha particle and gold Nuclei

Homework Statement When an alpha particle collides elastically with a nucleus, the nucleus recoils. Suppose a 3.94 MeV alpha particle has a head-on elastic collision with a gold nucleus that is initially at rest. What is the kinetic energy of (a) the recoiling nucleus and (b) the rebounding...