What makes electricity? Is it the heat or friction or? If voltage is the speed of electrons passing and you measure the speed, how do you measure current? Because doesn't the length o the conductor like decides how many electrons there are? Because the electrons enters AND leaves the conductor?

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.