Mechanics | Relativity Answers

2. Compute the contracted length of an

object whose initial length 30 m and travel with a velocity 0.65c?

A ball rolls up in inclined plane with an initial velocity w

(A) if its radius is r. What is it initial linear velocity? After a time t the ball stops

(B) what is it angular retardation

(C) what is it angular displacement before its stops

A ball rolls up in an inclined plane with an initial angular velocity 100

(a) if its radius is r. What is it initial linear velocity? After the time t the ball stops.

(b) what is it angular retardation

(C) what is the angular displacement before its stops

A ball rolls up in an inclined plane with initial angular velocity 100.

(a) if its radius is r. What is it initial line velocity? After a time t the ball stops.

(b) what is it angular retardation

(c) what is the angular displacement before its stops

 E xplain the m otion of rigid body w ith a fixed point under no forces.

Define the Hamiltonism and derive C anonical Equations of Motion

 Derive Lagrange’s equation for a particle in a plane.

(6) Give the atomic view of dielectric

(1) Explain the term electric field and line of force

(2) Derived an expression for a dipole in an electric field.

(3) Compared electrostatic and gravitational field and show difference from each other.

(4) Calculate the electronic potential energy of an electron system of an atom.The radius of the orbit of the electron.2.16*10^-11m. The charge on the electron is 1.6*10^-19C. Where 1/4Eo=9.0*10^9NM^2-2

(5) Calculate the capacity of parallel plates condenser.what will be the capacity if the space between the plates is partially filled with slap of thickness and dielectric constant Er

A green line of wavelength 435 nm is

observed in the emission spectrum of hydrogen. Calculate the energy of one

photon of this green light.