Quantum Mechanics Answers

A rocket is launched from a spaceship travelling with a speed of 0.8c towards the
earth. If the speed of the rocket is 0.6c, what would be its speed as observed by an
observer on earth if the rocket is moving
(i) towards the earth (ii) away from the earth?

A beam of a electron I'm pinches on every step barrier of hight 0.035ev. Calculate the refraction of electron reflected and transmitted at the barrier which the energy of the electron (I) 0.045ev (ii) 0.02ev

three identical spin half fermions are to be distributed in three non degenerate distinct energy level the no of ways this can be done is = ?

An electron is emitted from the surface of the big metallic plane perpendicular to it with initial velocity 0 v , How far from the plane the electron may manage to move in two cases: 1) the electron moves in the braking electric field E , 2) additionally to the electric field E, there is a magnetic field B, directed parallel to the surface of the plane

derive uncertainty principle using gaussian wave packet

SHOW THAT minimum value of product occurs for a gaussian wave packet

why L² and only one of its components are regarded as constant of motion.

calculate the zero point energy of system consisting of mass of 10^ -3 kg connected to fixed point by a spring which is stretched by 10^ -2 m by a force of 10 ^ -1 N .
SYSTEM IS CONSTRAINED TO MOVE IN 1 DIRECTION.

Nuclear forces are mediated by exchange of pi-mesons of REST MASS 140 Mev .
using HEISENBERG UNCERTAINTY principle ,estimate the range OF Nuclear forces.

prove heisenberg uncertainity principle .hence or otherwise show that minimum value of product occurs for a gaussian wave packet