The answer to the question above is "630.25 hours" which is the time to recoup the difference in the water heater cost. This problem can be solved using a simple algebra equation which stated as (18*115*0.1/1000)x - (4*220*0.1/1000)x = $75. In this formula, x represents the time to recoup the difference in the water heater cost (Calculation: 0.207x-0.088x=75 --> 0.119x = 75 --> x = 630.25)<span>. </span>
Answer:


Explanation:
Let the initial charge on the two spheres are

now we know that the force between them is given as



now when two spheres are connected then final charge on them is given as

now the force between them is given as

now we have

So by solving above two equations we have


1).B
2.)C
i think the reason was because of the pangea theory that continents where once one big continent and over time it began to split
You didn't Provide choices to choose from. Please fix question and I'd love to be able to help.
Hacks in real life are tricks to help solve a problem with a simple solution.
Say for example, add a pinch of salt to whip egg white faster.