Fluids

Question 1

What is hydrostatic pressure?

Answer 1

1. This is the pressure dine by the fluid at equilibriums at a specific point in the water due to gravity.
2. Therefore it is dependent on how far you are inside the fluid.

Question 2

what is buyoncy?

Answer 2

Is the force that the object is giving off to the fluid, similar concept than normal force.

Question 3

what is Archimedes principle?

Answer 3

1. the buoyant force is equal to the weight of the fluid that is displaced due to the object.

Sunken objects

1. This helps explain a sunken object, in a sunken object the force of the weight will have overcome the buoyancy force.
   
   1. This also means that a normal force is present because as the object touches the floor.

Formulas

1. FB = (density of medium) ( volume of object) (g)
2. mg of object or weight: (density of object)(volume of object) ( gravity)
   
   1. these forces can be set equal to each other to find out different values.

Question 4

Explain the concept of relative density?

Answer 4

1. What is density: how compact a thing is D=M/V
   
   1. units: kg/m^3 or g/L
2. What: it is a way to mathematically determine if an object will sink or float. It helps us compare the density of the object in relation to that of the medium.
   
   1. if the medium is water = specific gravity
3. Equation:
   
   1. ​Pobject / Pmedium
   2. results > 1 object will sink
   3. results < 1 object will float

Percentage submerge:

• This equation is equal to Vdisplace/ V object if you want to determine the amount of the object that will be submerge in water

Question 5

Explain the concept behind the volume flow rate equation.

Answer 5

1. Purpose: This equation explains how fluid moves in a tube.
2. What does it tells us: The rate of a fluid in a tube will be inversely proportional to the area of the tube
   
   1. i.e in a smaller area fluid would move faster, than in a larger area fluid
3. Why is this important: This is important for the body to keep the flow of fluid consistent, which will help control pressure.

Question 6

Explain the concept of the continuity equation

Question 7

Explains the concept of Bernouilli’s equation.

Answer 7

1. Purpose: helps us related pressure that a fluid exerts on a pipe and the rate that the fluids have as it flows through that pipe
2. Condition: for fluids to be able to participate in Bernoulli’s equation:
   
   1. Have laminar flow
   2. no viscosity
   3. and are not compressible

General Concepts:

• The higher a fluid’s velocity is through a pipe, the lower the pressure on the pipe’s walls and vice versa. (does not work for blood pressure because blood has viscosity)
• Conservation: as a fluid flows through a pipe it will not lose or gain energy. Therefore no matter where the fluid is on a pipe if you take all the forms of energy that the fluid has on that point it will equal the same amount as anything else on that point.