Which best compares concave and plane mirrors? a.) Plane mirrors produce only virtual images, and concave mirrors
produce real and virtual images.
b.) Plane mirrors produce only real images, and concave mirrors produce real and virtual images.
c.) Concave mirrors produce only real images, and convex mirrors produce real and virtual images.
d.) Concave mirrors produce only virtual images, and convex mirrors produce real and virtual images.

Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.