the centers of two 15.0-kilogram spheres are separated by 3.00 meters. what is the magnitude of the gravitational force that one sphere exerts on the other?
a
1.11 × 10-10 n
b
3.34 × 10-10 n
c
1.67 × 10-9 n
d
5.00 × 10-9 n

C  1.67 × 10-9 N

Explanation:

The magnitude of the gravitational force between two objects is given by:

where

G is the gravitational constant

m1 ,m2 are the masses of the two objects

r is their separation

In this problem, we have:

r = 3.00 m

Substituting into the equation, we find

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

number of electrons for neutral cl