What is the mean distance between the Sun and the core of
the Milky Way?

Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects