Can someone solve this problem and explain to me how you got it

Explanation:

Coulomb's law states that the force of attraction or repulsion between any two charges is proportional to the product of the magnitude of charges and inversely proportional to the square of the distance between the charges

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∴

where is the force of attraction or repulsion

is Coulumb's constant=

and are the magnitude of the charges

is the distance between two charges

The force between the two charges is attractive if they are of different polarity

The force between the two charges is repulsive if they are of same polarity

Question 7:

Given: ,

By coulomb's law,

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Question 6:

Given: ,

By coulomb's law,

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