What kind of light source is an IMAX movie screen

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Truck traveling west on the highway experiences an acceleration to the east. what could be the cause of this acceleration

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided