he distance between the eyepiece and the objective lens in a certain compound microscope is 22.5 cm. The focal length of the eyepiece is 2.40 cm and that of the objective is 0.385 cm. What is the overall magnification of the microscope

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=