Physics please clarify
posted by Mary .
A charge of +1q is fixed to one corner of a square, while a charge of 3q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square, so the potential is zero at each of the two empty corners?
For Further Reading
Physics please clarify  bobpursley, Tuesday, September 4, 2007 at 9:06pm
stop looking for formulas. Voltage is q/distance. It is a scalar, so you add all the contributing charges. In this case,
voltage at empty corner= voltage from each charge
0= q/s 3q/s + x/d
where s is the side distance, and d is the distance from the empty corner to the center. d=.707s.
solve for x.
I am sorry for being such a bother,I appreciate all of the help you've given to me but I am still not getting this one! I think I am over thinking this problem. This is what i did so far please tell me if I am on the right track:
q/s  3q/s + X/d = 0
2q/s + X/d = 0
X/d = 2q/s
X= (2q/s)(d)
from here I am stumped.

I answered this once before. You have a geometrical relationship between a and s, d=.707s , so d/s can be converted to a constant. This gives you an equation that relates X to q.
Respond to this Question
Similar Questions

Physics
A charge of +2q is fixed to one corner of a square, while a charge of 3q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square, so the potential is zero at each … 
Physics please clarify
A charge of +2q is fixed to one corner of a square, while a charge of 3q is fixed to the diagonally opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square, so the potential is zero at each … 
Physics please clarify
Posted by Mary on Monday, September 3, 2007 at 12:40pm. download mp3 free instrumental remix A charge of +2q is fixed to one corner of a square, while a charge of 3q is fixed to the diagonally opposite corner. Expressed in terms of … 
Physics please clarify
Posted by Mary on Monday, September 3, 2007 at 12:40pm. download mp3 free instrumental remix A charge of +2q is fixed to one corner of a square, while a charge of 3q is fixed to the diagonally opposite corner. Expressed in terms of … 
physics
A positive point charge and a negative point charge have equal magnitudes. One charge is fixed to one corner of a square, and the other is fixed to another corner. On which corners should the charges be placed, so that the same potential … 
physics
A charge of +4q is fixed to one corner of a square, while a charge of 9q is fixed to the opposite corner. Expressed in terms of q, what charge should be fixed to the center of the square, so the potential is zero at each of the two … 
Help Please!
Charges of −4q are fixed to diagonally opposite corners of a square. A charge of + 5q is fixed to one of the remaining corners, and a charge of + 3q is fixed to the last corner. Assuming that ten electric field lines emerge from … 
Physics
Identical point charges of +2.9 µC are fixed to three of the four corners of a square. What is the magnitude of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner … 
Physics
Identical point charges of +1.1 ¦ÌC are fixed to three of the four corners of a square. What is the magnitude q of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner … 
AP Physics 2
Identical point charges of +3.3 µC are fixed to three of the four corners of a square. What is the magnitude q of the negative point charge that must be fixed to the fourth corner, so that the charge at the diagonally opposite corner …