How do air molecules enable sound to travel from a radios speaker to your ears

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

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.