Asmall metal sphere has a mass of 0.19 g and a charge of -21.0 nc. it is 10.0 cm directly above an identical sphere that has the same charge. this lower sphere is fixed and cannot move. if the upper sphere is released, it will begin to fall.
what is the magnitude of its initial acceleration?

The magnitude of its initial acceleration is 7.50 m/s²

Explanation:

Given that,

Mass of sphere = 0.19 g

Charge = -21.0 nC

Distance = 10.0 cm

We need to calculate the electric force

Using formula of force

Put the value into the formula

We need to calculate the net force

Using formula of net force

Put the value into the formula

We need to calculate the magnitude of its initial acceleration

Using newton's second law of motion

Put the value into the formula

Hence, The magnitude of its initial acceleration is 7.50 m/s²

- measure reactants precisely. ( first choice)

- stir to the reaction take place. ( second choice)

- wait patiently until the reaction completes. ( fourth choice)

- make sure to recover as much copper as possible. ( last choice)

i think it's 35 meters