Which of the following is MOST needed for cosmologists to study the age of the universe? A. Energy levels B. Static C. Size D. D
2 answers:
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Answer:
0.795m
Explanation:
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Answer:
Explanation:
The electric field is defined as the electric force per unit of charge, this is:
.
The electric force can be obtained through Coulomb's law, which states that the electric force between to electrically charged particles is inversely proportional to the square of the distance between them and directly proportional to the product of their charges. The electric force can be expressed as
.
By substitution we get that
Now, letting be the electric field at point A, letting
be the electric field at point B, and letting R be the distance from the charge to A:
.
The ration of the electric fields is
This means that at half the distance, the electric field is four times stronger.