The Prehistory of Jazz. The Africanization of American Music. An elderly black man sits astride a large cylindrical drum. Using his fingers and the edge of his hand, he jabs repeatedly at the drum head--which is around a foot in diameter and probably made from an animal skin--evoking a throbbing pulsation with rapid, sharp strokes.
nope, efficiency o fa machine cannot be greater than 100%...theoretically it shows sometime that efficiency of a machine can be 100%, but practically it cannot be possible as â¦ there is some loss of energy is always involved in different ways. Answer   In order for a machine to be 100% efficient, the amount of energy going into it has to be precisely equal to the energy the machine is putting out-with nothing lost.
Effective Labor Rate Effective Labor Rate â This basically is your total labor sales, or individual techâs labor sales, divided by the billed hours by the team or individual tech. For example, your shop labor rate is $80, Technician A bills 36 hours and generates $2,380 in labor sales. Take the $2,380 in labor sales, then divide by the 36 hours and you get $66.11 as an effective labor rate. You col-lected 82 percent of your door rate. At 100 percent of your door rate, the total tech labor sales should have been $2,880. I know some of you are saying that you have heard a different definition for effec-tive labor rate. That might be true, but we