A device used to initiate and control a sustained nuclear chain reaction.
To solve this problem we will use the equilibrium conditions in the Electrostatic Forces. In turn, we will use the concept formulated from Coulomb's laws to determine the intensity of the Forces and make the respective considerations.
Our values for the two charges are:


As a general consideration we will start by determining that they are at a unit distance (1) separated from each other. And considering that both are negative charges, they will be subjected to repulsive force. Said equilibrium compensation will be achieved only by placing a third force between the two.
Let the third charge be
is placed at a distance x from 

The force on
due to
is

The condition of equilibrium is



from 
To find the magnitude of
we use 


The magnitude of the third charge must be 0.43 the first charge 
Answer:
E=h.f
=5.2×1014×6.63×10^-34
E=3.496×10^-30 J
Answer:
D physiological condition
Explanation:
Sensation and perceptions are complimentary to each other but have different roles within the brain. Sensations are the process of experiencing the world with the five senses and sending that information to the brain. Perceptions are the way we interpret sensations.