Objects 1 and 2 attract each other with a electrostatic force of 18.0 units. if the charge of object 1 is doubled and the distance separating objects 1 and 2 is tripled, then the new electrostatic force will be units.

The electrostatic force between two charged objects is given by

where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the two charges

In this problem, the charge of object 1 is doubled:

while the distance between the two objects is tripled:

Therefore, the new electrostatic force will be


And since the original force was F=18.0 units, the new force is

Answer: buoyancy forceexplanation: in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.