Aray of light in water (index n1) is traveling upward toward the air and is incident at the water-air boundary at the critical angle. some oil (index n2) is now floated on the water. the angle between the direction of the ray in the oil and the normal direction is: a. sin-1(1/n1)b. sin-1(1/n2)c. sin-1(n1/n2)d. sin-1(1.00)e. sin-1(n2/n1)

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction