Point charges of 6.25 C and

2.75 C

are placed 0.350 m apart. (Assume the negative charge is located to the right of the positive charge. Include the sign of the value in your answers.)(a)Where can a third charge be placed so that the net force on it is zero? m to the right of the

2.75 C

charge(b)What if both charges are positive?

m to the right of the 2.75 C charge

Red blood cells can often be charged. Consider two red blood cells with the following charges:

15.4 pC

and +49.4 pC. The red blood cells are 3.77 cm apart. (1 pC = 1 10¹² C.)(a) What is the magnitude of the force on each red blood cell?

(b) The red blood cells come into contact with each other and then are separated by 3.77 cm. What magnitude of force does each of the red blood cells now experience?