The scrub board was the first washing machine invented. They have been made of wood, corrugated metal and even plastic. They were even called a great American invention by the New York Times and can still be seen around in antiques shops, garage sales or laying around in your grandma's house.
Unicode encodes the symbol as U+2126 â¦ ohm sign, distinct from Greek omega among letterlike symbols, but it is only included for backwards compatibility and the Greek uppercase omega character U+03A9 Ï greek capital letter omega (HTML &#937; Â· &Omega;) is preferred.n the third report of the committee, 1864, the resistance unit is referred to as B.A. unit, or Ohmad. By 1867 the unit is referred to as simply Ohm. The B.A. ohm was intended to be 10 9 CGS units but owing to an error in calculations the definition was 1.3% too small.
Chemical symbol O represents the element Oxygen. Oxygen is the 8th element in the periodic table.