4. A ball is thrown upward with an initial velocity of 9.8 m/s from of a building. a. Fill in the table below showing the ball's position, velocity, and accel eration at the end of each of the first 4 s of motion.

Time

(s)

1

2

3

Position

(m)

4.9

0

- 17.7

Velocity (m/s)

0

- 9
- 19

b. In which second does the ball reach the top of its flight?

c. In which second does the ball reach the level of the roof, on the way down?

Acceleration (m/s^ 2 )

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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i believe the answer is electric potential.

explanation:

snell's law

refractve index = sin incidence / sin refraction