What kind of light results when the total spectrum of refracted light is recombined?

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

The dot diagram represents the motion of the motorcycle as it moves from left to right

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius