Atomic and Nuclear Physics Answers

Farid El Gabaly is investigating the question what patterns do magnetic atoms form in very small pieces of metal? what evidence did he use to help answer his question?

A photon of wavelength 6000nm scatters from an electron at rest. The electron recoils with an energy of 60Kev . Calculate the energy of scattered photon and the angle through which it is scattered.

Po²¹² undergoes alpha decay. Alpha particle have K.E of 8.776MeV. Assume the mass of Alpha particle to be 6.67*10^(-27). Calculate their velocity

Why is Z<N in heavier nuclei ?

The potential energy of an fcc latticw is described by expression
U(r)= -4€[(p०/r)^6-(p०/r)^12]
Where É=3.12×10-³ ev and p•= 2.82Å. Calculate the lattice parameter of the crystal lattice.

An electrically neutral chlorine atom has 17 electrons orbiting the nucleus. One of the stable isotopes of this element has 18 neutrons in the nucleus. What is the atomic mass number of this isotope?

if 5000 J of work is used to raise a 102 kg crate to a shelf in a warehouse, how high was the crate raised? (express your answer in units of meters

The transition rate of electrons from the first excited state of the hydrogen atom to
the ground state is ~108/s. What is the minimum range of energies of the resulting
photons that are emitted?

4. The first excited state of E2 of hydrogen atom is 10.2 eV above the ground state E1. The degeneracy of the ground and the first excited states are 2 and 8 respectively. Determine the ratio of no. of atoms in the first excited state to the no. in the ground state at T=6000K.

A single photon of energy 100 MeV decays into an electron and a positron. Which of the following
statements is true?
(a) It does not violate any of the above conservation laws.
(b) This process violates energy momentum conservation.
(c) This process violates angular momentum conservation
(d) This process violates lepton number conservation.