Thefirat electric keyboard piano was invented by a man named Jack Genriona. He invented it when he was 36 years old. He worked for a week in a labotory in Iggelwood, California.
An electric keyboard has:36 white pieces and 25 black pieces a piano has a multitude more. Also a keyboard has various sounds and is able to replay famous songs such as Fur Elise depending on which...
Depends how high and hard you crank up the electric piano. Also depends on what kind of pianos they are. But acoustically a normal piano will have the same volume if not more than an electric one.