Fluids Ch 3

Question 1

incompressible fluid + example

Answer 1

more fluid above an object= greater force exerted by fluid & greater pressure
-ex: pool or lake

Question 2

factors affecting change in pressure for incompressible fluid

Answer 2

-depth of and object in the fluid
-density of the fluid

Question 3

depth in pressure

Answer 3

increases

Question 4

greater density

Answer 4

greater pressure

Question 5

force & pressure

Answer 5

stronger force = stronger pressure

Question 6

surface area & pressure + example

Answer 6

larger area= less pressure
-walking on ice , laying down

Question 7

compressible fluid
-molecules of gas…
-when they meet an obstacle
-each collision
-when you add up the force of each collision..

Answer 7

-molecules of gas move in random motion
-when meeting a obstacle, they collide & change direction
-each collision gas molecules exert a force on the molecule
- add up the fporce of each collision and that becomes pressure of gas

Question 8

more collisions

Answer 8

more pressure

Question 9

things that affect # of collisions (2)

Answer 9

-# of gas particles
-tempature ( +temp. , +movement, +collisions, +pressure
-volume of a gas (how much space particle has to move)

Question 10

lower volume…

Answer 10

higher pressure

Question 11

as altitude increases (atmospheric pressure)..

Answer 11

pressure decreases

Question 12

1st princple of a.p.
-example

Answer 12

fluids move from high pressure to low pressure
-ex: fire extinguisher, spray)

Question 13

2nd principle
-example

Answer 13

pressure applied to the surface of a fluid in a container gets evenly distrubuted to all fluid
-ex: car brakes

Question 14

3rd principle
-example

Answer 14

trasnfer of presssure can increase the force
-ex: hydraulic piston