What happens to a light ray if it is incident on a reflective surface along the normal? a. the incident ray retraces its original path. b. the incident ray is reflected perpendicular to the normal. c. the incident ray is reflected at an angle to the normal. d. the incident ray is not reflected.

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

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

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative