2006-12-06 10:16:50 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
The gas is pressurized and there is a tube from the nozzle to the bottom of the can. That's why you turn a spray paint can upside-down to clean it - it puts the end of the tube up into the gas so it can blast out the paint remaining in the tube & nozzle.
2006-12-06 10:21:14 · answer #1 · answered by John's Secret Identity™ 6 · 0⤊ 0⤋
The spray nozzle is connected to a long plastic tube which runs down almost to the bottom of the can. The gas (propellent) on top of the liquid in the can forces it up the tube to the spray nozzle when the button is depressed.
2006-12-06 18:22:09 · answer #2 · answered by Ricvee 3 · 0⤊ 0⤋
The pressure in the can exceeds the atmospheric pressure, therefore, the liquid is forced out the nozzle when depressed.
2006-12-06 18:37:34 · answer #3 · answered by Brain 2 · 0⤊ 0⤋
It is under pressure, and expands. Actually, much of the propellant gas is often liquid rather than entirely gaseous; the evaporation of the liquid keeps the pressure fairly constant so that the squirt doesn't diminish as the can contents is depleted.
2006-12-06 18:19:20 · answer #4 · answered by Anonymous · 0⤊ 0⤋