The velocity of a wave is primarily determined by the

The propagation velocity of a wave depends on the medium in which it propagates.  

In addition, it depends on the type of wave, for example a mechanical or electromagnetic wave.  

In any case, the velocity of a wave is generally related to the value of the wavelength and the period, and can be expressed mathematically through the following formula:  

where is the velocity of the wave, is the wavelength and is the period.

Therefore:

the simple machine has three main features. they are:

fulcrum is the center point or pivot point of the machine. effort is input force/ applied force. load is external force/ output.

the keisha 's machine labels are

x : load

y: fulcrum

z: lever