Three point charges are arranged at the corners of a square of side as shown. a) what is the potential at the fourth corner (point a)? b) find the magnitude and direction of the electric field at point a. (show your choice of coordinate system.) c) what is the total potential energy of this system? hint: to calculate the total potential energy: re-construct the system by bringing each charge (from infinity) to its current position.

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer