On a graph showing distance versus time, a horizontal line represents an object that is?
a. moving at a constant speed
b. increasing its speed
c. decreasing its speed
d. not moving at all

What happens to the light rays when they hit the specimen?

Based on the concept of the wave-like nature of light, huygens' theory of light postulates that the more light was "bent" by a substance the slower it would move while traversing across that substance. a) deflection b) interference c) refraction d) resonance

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest