Answer:
There are seven fundamental physical quantities they are: length, mass, time, electric current, temperature, amount of substance, and light intensity.
Answer:
The answer is 24 (for the first question).
Explanation:
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Answer:
Electrical energy is answer
Explanation:
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Answer:

Explanation:
T = Tension on the string
E = Electric field
= Permittivity of free space = 
As the forces balance themselves we have the equations


Dividing the equations we get

Electric field is given by

The magnitude of the charge on each plate is 