A positive and a negative charge are initially 4 cm apart. When they are moved closer together so that they are now only 1 cm apart, the force between them is (a) 4 times smaller than before
(b) 4 times larger than before
(c) 8 times larger than before
(d) 16 times lager than before

c the car's velocity increases constantly over time.

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.