Physics Questions and Answers January 19, 2020

The figure below shows a series of three coaxial discs, which are polarizers. Suppose the transmission axes of the left and right polarizing discs are perpendicular to each other. The central disc is rotating on the common axis with an angular speed . Unpolarized light is incident on the left disc with an intensity Imax. Determine the intensity of

Transmissign axis 9 ot Imax Transmission axis

A block with mass m kilograms is attached to a spring with spring constant k = 0.9 Nm-1. A damping force which is proportional to velocity (Fd = -b v ) is acting on the block and the equation of motion of the system is given by: Find the mass m of the block. Give an appropriate reason to support your answer.

3.75x 2.25x0 d note that dx dx v, dt 3D 3D 3D dt

what is gravity?