Answer:
If all these three charges are positive with a magnitude of 
each, the electric potential at the midpoint of segment 
would be approximately 
.
Explanation:
Convert the unit of the length of each side of this triangle to meters: 
.
Distance between the midpoint of and each of the three charges:
Let 
denote Coulomb's constant (
.)
Electric potential due to the charge at 
: 
.
Electric potential due to the charge at 
: 
.
Electric potential due to the charge at : 
.
While forces are vectors, electric potentials are scalars. When more than one electric fields are superposed over one another, the resultant electric potential at some point would be the scalar sum of the electric potential at that position due to each of these fields.
Hence, the electric field at the midpoint of due to all these three charges would be:
.
Treatment water from the plant would affects the communities present in the downstream of the river.
Answer: Option (a)
<u>Explanation:</u>
Wastewater treatment plant is a process used to treat the water that flows from the rivers, streams, and lakes.This plant removes the dust, sand, sediments present in the river water.
When this treated water is released into the downriver stream, it affects the health of aquatic organisms present in that stream.Use of chemicals in treating the wastewater may cause genetic problems to the communities present in that region.
It also causes air pollution and more energy is needed for the treatment process and thus affects the ecosystem.
.
.
.