Pressure in a Bottle
The pressure exerted or forced on to the different holes caused the water projecting out into the bucket to shoot out at different distances. This can be connected to the formula P=F/A. The amount of water sitting above each hole is the amount of force pushing down on each hole. The amount of water sitting above hole A is less than hole C, therefore the FORCE (N) of water pushing down at hole A is less than hole C. Now, since the AREA of the holes are the same, and the area of the water bottle is the same, we can say that the AREA remains the same.
EG. Hole A: 2N of water divided by 1cm2 area. This would equal 2N/cm2.
Hole B: 4N of water divided by 1cm2 area. Equalling 4N/cm2
Hole C: 6 N of water divided by 1 cm2 area. Equalling 6N/cm2
The following video is similar to what we did in class.....
EG. Hole A: 2N of water divided by 1cm2 area. This would equal 2N/cm2.
Hole B: 4N of water divided by 1cm2 area. Equalling 4N/cm2
Hole C: 6 N of water divided by 1 cm2 area. Equalling 6N/cm2
The following video is similar to what we did in class.....
Pneumatic VS Hydraulic Systems
In a previous class you did an activity that showed you a physical difference between hydraulic and pneumatic systems. Primarily that systems with liquids are INCOMPRESSIBLE OR NON-ELASTIC, and systems with gasses (air) are COMPRESSIBLE, AND ELASTIC.
Now try connecting two syringes with a plastic tube. Follow my instructions to fill with air first, then water. Observe the differences in movement.
The video below shows you how you could build a device that is automated by enclosed fluid power. In this case, the student chose WATER as the fluid. You could also use AIR. In a Hydraulic system, OIL is often used. Can you think of a reason why oil instead of water could be used?
Now try connecting two syringes with a plastic tube. Follow my instructions to fill with air first, then water. Observe the differences in movement.
The video below shows you how you could build a device that is automated by enclosed fluid power. In this case, the student chose WATER as the fluid. You could also use AIR. In a Hydraulic system, OIL is often used. Can you think of a reason why oil instead of water could be used?
Pressure and its relationship to Hydraulic and Pneumatic systems:
Okay, so I couldn't find part 2 of this video series. Instead here is a fun video that at very least, gives you examples of pneumatic systems and a little more....
How Submarines use COMPRESSIBLE gas:
Now, with this information, you can start to fill in the PNI chart provided. =)