How does the vertical component of the velocity of the projectile change as it travels from point a to point c?

remains constant at a positive value

increases to point b, then decreases

remains constant at a negative value

decreases at a constant rate

decreases at a constant rate

Explanation:

At A, the vertical velocity component is positive.  At B, it is 0.  At C, it is negative.

So the vertical velocity component is decreasing, specifically at the rate of the acceleration due to gravity.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

answera compound;