Answer:
F = - 10.417 × 10²¹ N
since, the charges are opposite in nature, thus they will attract.
Explanation:
Data provided in the question:
charges
q₁ = 5 C
q₂ = -3 C
r = 3.6 × 10⁻⁶ m
now,
the force (F) between the two charges is given as:

k is the coulomb's constant = 9 × 10⁹ N·m²/C²
on substituting the values, we get

or
F = - 10.417 × 10²¹ N
since, the charges are opposite in nature, thus they will attract.