A beam of light moves through the first block and refracts into the second block. It is then totally internally reflected at the interface between the second and third block. Finally it refracts into the fourth block. How do the indices of refraction of the four blocks compare

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

What is a carrier wave and how does it affect what you hear on the radio