Describe a simple experiment to show that sound cannot propagate through vacuum

-- Put an alarm clock or a small radio into a jar.

-- Close and seal the jar air-tight.

-- While you're listening to the clock or the radio making sound, start removing the air from the jar with some kind of vacuum machine.

-- Listen to what happens to the sound as the amount of air in the jar becomes less and less.  

answer; the correct answer is technician a; ///100%good luck

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