Answer:
4.30 x 10⁵ N/C
Explanation:
Two positive +3.0-μC point charges at opposite corners of the square creates equal and opposite electric field at the center. hence the electric field by these two positive charges at opposite corners becomes zero.
= length of the square of side = 0.50 m
= distance of the center from each corner = 
Magnitude of net electric field at the center is given as

<span>the ability to do work</span>
In Thermodynamics, a science that deals with the study of heat and temperature and their relationship to energy and work, finer details of the process is unpredictable. Heat in Physics is an energy that is in a process of transfer between a system and its surroundings other than the transfer of matter.Heat flows from a hotter to a colder body when there is a physical pathway. This pathway is suitable and can be direct such as radiation and conduction. It can also be indirect as in convective circulation.