Most of the energy on life starts with the sun. Plants cannot thrive without the sun, and carbohydrates come from plants. Animals feed off of those plants; therefore, the sun is your answer. :)
The answer is <span>5.2 × 10-2 newtons.
To calculate this, we will use Coulomb's Law:
</span>F =

where F is repulcive force, k is constant, Q is charge, r is distance between charges.
<span>
If:
</span>

=

= 1.2 ×

C²
r = 5.0 ×

C²
k = 5.0 ×

Then:
<span>

</span>⇒

⇒

⇒