physics chapter 5 Flashcards
Question
Answer
What is Hemodynamics?
It is the branch of science that describes how blood flows, focusing on the relationships between blood pressure, blood flow, and physical properties of blood.
What factors affect how well blood flows?
The heart, blood vessels, and conditions affecting the circulatory system determine how efficiently blood is delivered to organs.
What are the properties of fluids?
Key fluid properties include density, viscosity, temperature, pressure, specific volume, specific weight, specific gravity, and surface tension.
How does fluid exert force on an object?
A fluid exerts force perpendicular to any object immersed in it and transmits force uniformly in all directions when at rest.
What is atmospheric pressure?
Atmospheric pressure is the pressure exerted by the weight of the gases in the atmosphere, decreasing as elevation increases. It is measured as 101,325 Pa (1 atm) at sea level.
How is pressure calculated?
Pressure is calculated as force per unit area:P=FAP=AF, where F is force in Newtons, and A is area in square meters.
What happens to fluid pressure with depth?
Fluid pressure increases with depth due to the weight of the fluid above, following the formulaP=ρghP=ρgh, whereρρis fluid density,ggis gravity, andhhis depth.
What is Pascal’s Law?
Pascal’s Law states that pressure applied anywhere in a confined incompressible fluid is transmitted equally in all directions throughout the fluid.
How does fluid flow in relation to pressure?
A fluid moves from a region of higher pressure to a region of lower pressure, and the greater the pressure gradient (ΔPΔP), the faster the flow.
What is the principle of continuity in fluid mechanics?
It states that the mass of fluid passing through different cross-sections of a streamline flow is constant, soA1v1=A2v2A1v1=A2v2, whereAAis area andvvis velocity.
What is Bernoulli’s equation?
Bernoulli’s equation relates pressure, velocity, and elevation in a fluid flow:
