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Answer:
B. they bring cold , polar winds to the equator
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>⇒

⇒

⇒
Answer:
d. to produce the soil
Explanation:
pioneer species produce soil so other species less hardy can grow
Diffusion happens when there is a difference in concentration. So for water to diffuse out of the cell, the concentration of water has to be lower outside the cell, than inside the cell.