Quantum Mechanics Answers

6.5=0(3.6)+1/2(3.6)

How does number of blades in a windmill effects its energy and speed? And how many blades should be there in a windmill?

What is potential energy in quantum mechanics?
proof

A parallel beam of light is incident normally on a plane surface absorbing 40% of the light and reflecting the rest . If the incident beam carries 10W of power , find the force exerted by it on the surface .

A certain rifle bullet has a mass of 8.61 g. Calculate the de Broglie wavelength of the bullet traveling at 1289 miles per hour. Physical constants can be found here.

The wave function of a certain particle is φ = Acos^2x for -π/2 to π/2(1) find the value of A(2) find the PROBABILITY THAT PARTICLE BE FOUND between O AND π/4?

What happen when electron gently released in electric field

if A^ and B^ are hermitian and anti-hermitian operators respectively.check the hermiticity of the commutator [A^,B^] of the two operators .

Suppose that the momentum of a certain particle can be measured to an accuracy of one part in a thousand, Determine the minimum uncertainty in the position of a particle if the particle is (a) a 5 x 10-3 Kg mass moving with a speed of 2 m/s, (b) an electron moving with a speed of 1.8 x 108 m/s

the work function of cesium is 1.96 eV. If radiation of wavelength 4.00 x 10^2 nm is incident on the surface, find the kinetic energy of the ejected photoelectrons in eV and the speed of the ejected electrons