An alloy of two metals has a volume V and a mass m. Density of metals p1 and p2. What is the mass of the first metal in the alloy? Read V = V1 + V2 I give 25 points

Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3