A. A control group is given the experimental treatment.
Answer:
4×10⁴ seconds
Explanation:
Assuming you have a calculator on hand, inputting 300 ÷ .0081 give should give you 37037.0370...
In scientific notation, that number would be 3.70370370...×10⁴ and when taking into account the rounding rules for significant figures, the answer is 4×10⁴ seconds.
Answer:

Explanation:
From the question we are told that:
Average distance 
Generally the equation for change in electric potential energy is mathematically given by

Where
U_1=0 Because of initial lengthy distance apart
And



Therefore


