Which equation shows how wavelength is related to velocity and frequency?
a. 2 = 1/2 b. z =vxf c. 2 = 1
d. 2 = v +f

A__ is two or more substances that are together in the same place but are not chemically combined

Which type of reaction always has an element and a compound as reactants

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.