Silicone rubber impression materials exhibiting strength, elasticity and dimensional stability were discovered in 1955 in University of Liverpool byS.L. Pearson.
Explanation:
• Silicone rubber is a high-performance elastomers which characterized by an unusual combination of properties.
• Excellent electrical insulation properties as well as its transparency, these properties range from high temperature performance to durability.
• Rubber like material composed of silicone containing silicone together with other molecule like, hydrogen, carbon and oxygen.
• Its structure always comprises silicone-oxygen chain and an organic moiety bound to the silicon
e.
All the stars we see in the night sky are in our own Milky Way Galaxy. Our galaxy is called the Milky Way because it appears as a milky band of light in the sky when you see it in a really dark area.
Composer and performer of Old Occitan lyric poetryduring the High Middle Ages (1100–1350). Since the word troubadour is etymologically masculine, a female troubadour is usually called a trobairitz.