Two balloons are charged with an identical quantity and type of charge: -4 nc they are held apart at a separation distance of 70 cm. determine the magnitude of the electrical force of repulsion between them.

29.4 uN

Explanation:

The electric force between two charges can be calculated using Coulomb's Law. According to this law the force between two point charges is given as:

where k is a proportionality constant known as the Coulomb's law constant. Its value is Nm²/C²

r = distance between charges = 70 cm = 0.7 m

q1 = q2 = 4nC = C

The negative sign indicates that the charges are negative. In the formula we will only use the magnitude of the charges.

Using these values in the formula, we get:

Therefore, the magnitude of repulsive force between the given charges will be 29.4 uN

gravity

explanation:

hi there!

out of the two, (b) precision would be more reasonable.   however, both a and b could be pretty reasonable.

-awesomerepublic   : )