Atomic and Nuclear Physics Answers

a) What is the difference between Instantaneous Velocity and Average Velocity? Give detail with suitable examples.

Two charged objects in a laboratory are brought to 0.22 meters away from each other. If the force between the spheres is 4,550 N and the charge on one object is 9.9 × 10-5 C, what is the charge on the other object?

Two metal rods in a factory are oppositely charged and placed 8.9 cm apart. One rod has a charge of +7.5 × 10-7 C and the other has a charge of –5.1 × 10-5 C. What is the force between the rods? Is it an attractive or repulsive force?

Approximately how many nucleons are there in a 1 kg object

An alpha particle travelling at the velocity of 100 km/s flies at an angle 20° into a 1 meter wide area of homogeneous magnetic field with induction 5 mT as shown in the figure. The velocity direction of alpha particle is perpendicular to the field induction lines. In what time will the alpha particle leave the homogeneous magnetic field? Neglect the gravity action. Take the alpha particle charge-to mass ratio as 4.8 x (10)^7 C/kg. Give your answer in microseconds and round it to the whole.

A hydrogen atom goes to excited state absorbing a photon with wavelength [100/99R]A° where R is the Rydberg constant. If this absorption corresponds to a transition line in the Lyman series calculate the energy of the excited state.
Ans: -0.136ev

Nuclear has no charge on it can we say it is also in equilibrium state

Why the number of neutrons tends to exceed the number of protons in stable nuclei?

Discuss graphically the variation of average binding energy per nucleon with A. Also explain
the stability of the nucleus on the basis of this concept.