Pressure circus notes
Published on: Mar 4, 2016
Transcripts - Pressure circus notes
PRESSURE force of air pressing downLess air particles- Low air More air particles- High airpressure pressure
High to LowPressure(Many to Less)How do youchange thepressure?
Inverted Cup When cup is completely cardboard filled with water, no air is left in cup, thus no air pressure. The inverted cup can therefore hold water up because the air pressure is working against the underside of the cup. Air PressureThere is higher air pressure outside pushing upward than the inside of cup pushing downward.
Straw Drinking Race The higher pressure in outside air pushes the liquid up the straw in our mouth The student with the leaky straw cannot create a Sucking creates a vacuum above the partial vacuum or a liquid, so the liquid is not lower pressure in pushed up.straw above the liquid that we drink
Stop the Leak By plugging one of the holes, the air inside stays the same because outside air is prevented from comingAir cannot go into the hole. The higher water in volume inside causes a decrease in pressure. Thus, outside air pressure (which is greater) pushes against the water and prevents it from flowing out. Liquid cannot Air pressure outside of can is greater flow out than air pressure inside.
Collapsing CanBefore heating, the can was filled with water and air.By boiling the water, the liquid changed into water vapor The water vapor or steam pushed the air that was inside, out of the can. In closing off the can, air is prevented from going back to the can. Cooling (water in basin) condenses water vapor back to water. All the vapor which took up space inside the can turned into a few drops of water, which take up less space. Pressure inside can drops allowing outside air pressure to push on the can and crush it.