If the law of conservation of energy applies to a situation, then: A. matter is entering and leaving the system.
B. the output work being done is greater than the work being put into
the system.
C. the system is an open one.
D. the total (PE + KE) before an event is equal to the total (PE+ KE)
after the event.
SUBMIT

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.