Answer:
the answer is 5 electrons
Explanation:
because its the same name as the amount of protons
Then the the speed of the molecules also increase
When light is passing from a denser medium to a lighter medium ( for example: from water to air)
<span> When the angle of refraction is greater than the critical angle( angle of incidence when the angle of refraction is perpendicular to the normal) of the denser medium.</span>
To calculate the average acceleration of the ball we use the formula,
Here, 
is the final velocity of the ball and 
is the initial velocity of the ball t is the time in contact with the wall.
Given 
towards the wall and 
away from the wall and 
.
Substituting these values in above formula , we get
Here is negative because ball is moving away from the wall.
Therefore, average acceleration of the ball is 
(away from the wall).
