Which evidence best supports the reason?
Teenagers who are tired are often tardy or fall asleep in
class.
If students start school later, it could make parents late for
work.
Students should go to bed earlier so they will not be so
tired in the morning.
Teenagers who start school later might not have time for
after-school sports.

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.