Athin ring of radius 73 cm carries a positive charge of 610 nc uniformly distributed over it. a point charge q is placed at the center of the ring. it is observed that the electric field at point p, which is on the axis of the ring and 70 cm from its center, is equal to 2000 n/c and is directed away from the center of the ring. determine the value of q.

Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match

Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created

When can a theory be modified if a new type of technology allows for new observations that raise new questions? a-immediately, while the questions about the theory are being asked b-after new hypotheses related to the theory are tested in experiments c-only after the new observations disprove all parts of the theory d-while scientists begin to think about how the theory could improve