Atomic and Nuclear Physics Answers

For X-ray radiation with photon energy 1 MeV, the half value layer (HVL) was found to be (a) for water 10.2 cm, (b) for bone 2 cm. Find linear and mass attenuation coefficients for water and bone. The density of water ρw = 1 g/cm3, density of bone ρb = 1.85 g/cm3.

What is grounding? What effect does it have on a charged conductor? On a charged insulator?

Describe how a positively charged object can be used to give another object a negative charge? What is the name of this process

What will be the energy of the 5th orbit of hydrogen atom if the energy of the 1st orbit of this atom is 13.6 eV?

In co, the J=0 →J=1 transition, absorption occurs at forequency 1-15x10" Hz. Moment of Inertia of the molecule is ? (b) find the Bondlength of the Co molecule.

What is the distance between two protons so that their Coulomb potential is barrier potential 200 keV 

can something be created out of nothing?

in 180 minutes, the activity of a certain radioactive substance falls to 1/8 its original value. calculate its half life

A particular atom emits a photon of wavelength 471 nm when one of its electrons undergoes a transition from one stable energy level to another. If the final energy level has an energy of -6.04 eV, what is the energy of the inital energy level?

For each of the following nuclei, use the semiempirical mass formula to 

compute the total binding energy and the Coulomb energy: (a) 21Ne; 

(b) 57Fe; (c) 209Bi; (d) 256Fm