Which changes take place when melted metal is poured into a mold?

A physical change happens, because the chemical composition of the metal does not change when the metal gets poured into the mold and becomes a new shape.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.