Auniform solid sphere with mass m and radius r is rotating about an axis which is a distance of 2r from the center of the sphere. calculate the moment of inertia of the system (kg. m2) if m=2kg and r=1m. (moment of inertia of a solid sphere rotating about its center of mass = 2/5 mr2)

The sun generates both mechanical and electromagnetic waves. which statement about those wave is true?

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.