What are the 3 phases of matter involved in the particle model?
Solid, Liquid, Gas.
100
What is the formula for calculating pressure?
P = F/A
100
Force = 200N, Area=0.1m sq. - Calculate Pressure.
2000 Pa or 2kPa
100
What is a fluid?
Something that is able to "flow" - so technically it is a liquid or a gas.
100
"Blood is thicker than water"
They are both incompressible fluids but blood has a higher density.
200
Solid, Liquid, Gas - Which case are the particles moving the most?
Gas.
200
If you increase force, what will happen to the pressure?
Increase
200
Force = 1600N, Area = 80 m sq. - Calculate Pressure
Pressure = 20Pa
200
Which fluids are referred to as compressible fluids? Why?
Gases, because they do not have a definite volume, you can squish them into a smaller space.
200
The front of your paper won't cut you but the side will give you a paper cut.
Pressure will be much higher from the side because it's a smaller surface area.
300
When temperature increases, what happens to the particles?
They speed up.
300
Standing on your bed or lying down on your bed - Which will have a higher pressure? Explain why.
Standing - because it is a smaller surface area (your weight is not distributed)
300
Pressure = 100Pa, Force = 200N, Calculate Area
2 m squared
300
What are the 3 factors impacting the number of collisions in a compressible fluid?
Number of particles, temperature and volume.
300
Explain your breathing using the particle model.
You breathe in, volume in your lungs increases, pressure decreases, so the particles rush in to fill up the empty space. When you exhale your lungs shrink to the particles move out.
400
Which phase of matter has a definite volume and an indefinite shape?
Liquid
400
A 1L milk carton and a 2L milk carton both exert the same amount of pressure on the table. Why would that be?
Even though the 2L is putting more force on the table because it is heavier, it is spread out on a larger surface area, so the pressure comes out the same.
400
Pressure = 5000 Pa, Area = 0.1 m squared. Calculate Force.
F = 500N
400
Which of the following will decrease the pressure of the fluid?
higher temperature, higher number of particles, higher density, higher volume
400
What is the average blood pressure in your arteries?
10-16kPa
500
Explain the natural tendency of particles. (First Principle - Fluids)
They will move from an area with high pressure to an area of low pressure.
500
What 2 factors impact pressure of an incompressible fluid?
Depth and density.
500
A desk and a bureau are both exerting the same amount of pressure on the floor. The desk has a force of 1200 N and is taking up an area of 0.4 m sq. and the bureau is taking up an area of 0.2m sq. What is the Force of the bureau?
Force = 600N
500
Kool-Aid or Honey. Which would be easier to swim in? Why?
Kool-Aid would be easier. There is more pressure in the honey because there would be more force directly above you (higher density than kool-aid).
500
Use pressure and fluids to explain how your circulatory system works.
When your heart pumps the volume decreases for a second, the blood (fluid) rushes out into the arteries where there is less pressure. There is high pressure pushing your blood through your arteries. They move towards lower pressure in your veins. Then your veins use valves to push the blood back to your heart.