Final answer:
The magnitude of the force between two charged spheres, given that each charge is 1 \times 10^{-7} C and they're separated by 0.7 m, can be calculated using Coulomb's Law and results in a force of

Step-by-step explanation:
To calculate the magnitude of the force between two charged spheres, we can apply Coulomb's Law:

where:
- F is the force between the charges,
- k is Coulomb's constant (≈ 8.99 \times 10^9 Nm^2/C^2),
- q1 and q2 are the charges of the spheres (both are 1 \times 10^{-7} C in this case), and
- r is the distance between the centers of the two charges (0.7 m).
Substituting all the values into the formula:
F =

By calculating, we find:
F =

And this results in:
F =

Thus, the magnitude of the force between the two charged spheres is
