A screen is placed between two lamps so that they illuminate the screen equally, as shown in figure 16-7. The first lamps emits a luminous flux of 1445.0 lumens and is 2.5 m from the screen. what is the distance of the second lamp from the screen P is 2375.0 lm please show work

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.