What is a variable speed drive? A variable speed drive is a piece of equipment that regulates the speed and rotational force, or torque output, of an electric motor. The background and technology. There are millions of motors in use in industry and offices around the world.
The specific gravity for Obsidian is 2.35, it's refractive index is 1.48-1.51, and it's double refraction is None. History Obsidian is named after a Roman, Obsius.
Best Answer: My reference book only goes up to 80% H2O2 and that specific gravity is 1.3406. If I extrapolate, I would say that 90% H2O2 would have a specific ...