Which biogeochemical cycle is relied upon for plant photosynthesis? 1)phosphorus 2)nitrogen 3)carbon 4)hydrologic

Aray diagram for a refracted light day is shown. what does the dashed line represent

The ph is the a.independent variable b.the dependent variable c.control group

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.