Which sentence best describes frustration? a. when you can't achieve your goal because you had a poor plan b. when you achieve your goals despite certain events c. when you can't achieve your goal due to events beyond your control d. when you can't achieve your goal because you are not trying hard

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.