Aparticle with a charge of -4.0 μc and a mass of 3.2 x 10-6 kg is released from rest at point a and accelerates toward point b, arriving there with a speed of 72 m/s. the only force acting on the particle is the electric force. what is the potential difference vb - va between a and b? if vb is greater than va, then give the answer as a positive number. if vb is less than va, then give the answer as a negative number.

Explanation:

We have given charge on the particle

Mass of the charge particle

From energy of conservation kinetic energy will be equal to potential energy

So at point A

At point a velocity is zero

So

At point B velocity will be 72 m/sec

So

So

answer: the correct answer for the fill in the blank is rods.

rods are the specialized photoreceptor cells that are present in the retina of human eye. they are responsible for vision in the night time ( also called scotopic vision). they have very low visual acuity and color distinguishing ability.

as they are responsible for vision in night time, therefore they are found predominantly in the nocturnal animals.