Which of the following examples can be used to demonstrate the behaviour of current electricity? a. water freezing on a lake c. water flowing down a river
b. water contained in a hot water tank d. water being held back by a dam
c. water flowing down a river
d. water being held back by a dam

The results of huy's eye exam show that he is nearsighted. which explanation should huy expect to hear? "you need convex lenses to shorten the distance that light takes to focus in your eyes." "you need concave lenses to shorten the distance that light takes to focus in your eyes." "you need convex lenses to lengthen the distance that light takes to focus in your eyes." "you need concave lenses to lengthen the distance that light takes to focus in your eyes."