A
is a process that occurs when one or more substances are changed
into one or more new substances. For example, when zinc and sulfur are mixed
together with the addition of energy in the form of heat, zinc sulfide (ZnS) is
produced.
A. Chemical change
B. Physical change
C. Material change

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

f=ma a/f/m a= 480/60 a = 8m/s/s that is quick wow