Atomic and Nuclear Physics Answers

Problem - Determine the total number of energy states in silicon between E, and E + kT at T = 300 K.

A spring has a force constant of 80 N/m, it vibrates with a frequency of 7 Hz.

Calculate the,

a) period;

b) angular frequency;

c) mass of the spring.

find the fermi energy of copper by assuming that each copper atom contributes one free electron to the electron gas . the density of copper is 8.94 x 10^3kg/m^3

In a radioactive decay, a nucleus of mass 4.0 × 10-25kg initially at rest emitted an a-particle of mass 6.7 x 10-27kg with a velocity of 1.5 x 107 ms-¹.

a Calculate the velocity of recoil of the nucleus.

b Calculate the kinetic energy of:

1 the recoil nucleus,

ii the o-particle.

A stone thrown from the top of a building is given an initial velocity of 20.0 m/s straight upward. The stone is launched 50.0 m above the ground Determine the time at which the stone reaches its maximum height.

Assuming that 80% of the Mars surface is covered with water at an average

depth of 3.5 miles and the radius of the earth is given by 5.97x106 meter,

estimate the mass of the water on the Mars in kilogram

Charge q1 = 7.00 μC is at the origin, and charge q2 = -5.00 μC is on the x-axis, 0.300 m from

the origin as shown below. (a) Find the magnitude and direction of the electric field at point P,

which has coordinates (0, 0.400) m. (b) Find the force on a charge of 2.00 × 10-8 C placed at �

Question 17

One of the main reasons why people constantly try to reduce the mass of objects is to be able to increase its speed and acceleration. All of the factors have an effect on each other. If something has much more mass, then exerting more force will make it move faster. This is an application on which law of motion? Explain

A bird flying due north with a velocity at 15m/s shed a feather in air current flowing at 20m/s due east. Find the resultant and direction of the feather.

Debye temperature of diamond is 2000k determine the mean velocity of diamond if the interatomic spacing is 1.45A. estimate the mode of a lattice vibration