Quantum Mechanics Answers

Consider a three-dimensional cubical well with N particles. Given that all particles occupy the ground state, calculate the total energy of the system. Now assume that each energy level can hold no more than two particles. Calculate the energy of the ground state of the system and the maximum particle energy called the Fermi energy. Given that there are

Consider a one-dimensional infinite square well with N particles. Given that all particles occupy the ground state, calculate the total energy of the system. Now assume that each energy level can hold no more than two particles. Calculate the energy of the ground state of the system and the maximum particle energy called the Fermi energy.

If two operator do not commute what does it mean

If a parallel beam of light of energy density U falls normally on an object and totally absorbed what is the pressure exerted on body

A photocell in the saturation mode is irradiated
by light of wavelength  = 6600 Å. The
corresponding spectral sensitivity of the cell is
s = 4.8 mA/W. Find the yield of
photoelectrons, i.e. the number of
photoelectrons produced by each incident
photon. [Take : h = 6.6 × 10–34 J-s]

A station emits wave of wavelength, Lamda at P. If the planck's constant is (h=6.63×10^-34 js) and the speed of light is (C=3×10^8 ms-1), what's the rate of emission of photon

A station emits 96MHz frequency at the rate of 100KW. Calculate the number of photons emitted per second.

Calculate the probability that the electron in the ground state of hydrogen will be found outside the Bohr radius.

Given the radial probability density function for the hydrogen atom in its ground state,

P_1s (r)=((4r^2)/(a_0^3 )) e^(-(-2r)⁄a_0 )

What is Heisenberg uncertainty principle, and how does it work for position and momentum measurements?

Solid 100.0-kg samples of gold (SG=19), iron (SG=7.8), and aluminium (SG=2.70) are thrown into a container of water and sink to the bottom.
3.1.1 Which sample has the greatest volume? (Choose from: gold; iron; aluminium or all tie)[1]
3.1.2 Which sample experiences the greatest buoyant force? (Choose from: gold; iron; aluminium or all tie) [1]
3.1.3 Calculate the buoyant force acting on the aluminium sample, when completely submerged in the water. [5]
3.2 The diagram of Figure 4 shows a hydraulic system using oil as the fluid. The pistons’ radii are 2.0 cm and 32.0 cm. An external force of F1 = 10.0 N is applied to the smaller piston. Ignore the weight of the pistons themselves