Sound in air is simply a compression of air at the frequency of the sound. The sound itself does not weigh anything, but the medium it is travelling in will have its own weight per unit volume.
The answer is stress
mass is the quantity of material in a substance, and volume is the space occupied. The density of a material is its mass (weight) per unit volume. Grams per cubic centimetre would be an example.
Sound, which is mechanical energy, travels through a solid by setting up a mechanical compression wave in that solid. When the compression wave of the sound in air strikes the solid, it compresses the solid. It isn't much, but the energy delivered by the air is transferred into the solid. Waves of compression and rarefaction move through the solid as they did in air, but move much faster in a solid.
Don't know if you are talking medical, mechanical or data compression. Contraction is when pressure is applied from outside, around an object. Muscles can contract to force a baby to be born or can cause a spasm. A strap can be tightened around something. Compression is pressure applied usually DICK in one direction, can be from all around like deep water compression. A vice can apply compression by tightening the jaws. A hydraulic press compresses items. Your spine can be damaged by compression, by too much pressure on your back which causes a compression fracture of the vertabra.
2
Graduated Cyinder
Compression springs cost about $3-$5 per spring.
150psi , per. cyl. J.H
smple, cyinder
formula to find compression ratio when bits per pixel is given
it's a device to measure volume in liquids
3 - 4 per cylinder.
around 125 psi per cylinder
100
Pi x diameter x height.
What is the cylinder compression on a 1991 Ford Ranger with a 2.9?