Answer:
The magnitude of the electrostatic force that one charge exerts on the other is [tex]9.2x10^{-8} N[/tex], due both of the charges are positive the force is repulsive.
Explanation:
Hi
We use the formula [tex]F= k_{e}\frac{q_{1} *q_{2} }{d^{2} }[/tex], where [tex] k_{e}=8.99 X10^{9}\frac{N*m^{2} }{C^{2} }[/tex] is a constant, so we have [tex]F=(8.99 X10^{9}\frac{N*m^{2} }{C^{2} } ) \frac{(7.80X10^{-9} C)(4.30X10^{-9}C)}{(1.81m)^{2} } =9.2X10^{-8}N[/tex]
