A concave lens has a focal length of -31 {cm}. Find the image distance and magnification that results when an object is placed 29 {cm} in front of the lens. d1= ? cm
m= ?

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.