**Answer:**

D. Newton's third law of motion

<span>c) what is the angle (relative to the horizontal) of the balls initial velocity?
</span>

Atomic number will always be the number of protons so the answer is 12

Answer:

0.00264C

Explanation:

Using the Columbs law formula

F = kq1q2/r²

F is the force of attraction

q1 and q2 are the charges

r is the distance between the charges.

k is the Coulomb's cinsrsnty

Given F = 19N, q1 = -0.0005C

r = 25m q2 = ?

Substituting

19 = 9×10^9×-0.0005q2/25²

11875 = -4,500,000q2

q2 = 11,875/-4,500,000

q2 = - 0.0264C

Magnitude of the second charge is 0.00264C