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1) Petrol density hydrometer: HYDROMETER 700 - 750 to measure the density of the Petrol
90mm (L) x 62mm (W) x 23mm Weight: 0
0401A 0 15ml 12
Retort stands non-corrosive
Temperature range: -50℃～200℃/-58℉～392℉
Newton's Colour Disc their 1) Petrol density hydrometer: HYDROMETERThe Newton's Colour Disc contains seven rainbow colored segments: violet, indigo, blue, green, yellow, orange, and red, in that specific order. When rotated, the colors eventually fade into white, proving Isaac Newton's theory that white light is composed of the seven colors of the rainbow. This disc serves as a visual demonstration of this scientific concept. It is used to demonstrate color mixing and the spectrum of colors. By rotating the disc, it
