Chapter 1: Fundamental Concepts Flashcards
define: Fluid Mechanics
a study of the behavior of a gas or liquid that is either at rest or in the motion
What are the principles of fluid mechanics based on?
Newton’s Laws of Motion
define: Hydrostatics
study of fluids at rest or constant velocity
define: Kinematics
study of the geometry of fluid motion
define: Fluid Dynamics
study of the forces that cause accelerated motion
define: Solid
maintains its shape because the molecules or atoms are densely packed and are held tightly together
define: Liquid
composed of molecules that are more mobile than those in a solid; they do not hold thier shape, rahter they flow and take the shape of their container.
define: Gas
composed of molecules that are much farther apart than those of a liquid; molecules are free to travel away from each other and therefore fill the entire volume of its container
What five basic quantities are used to describe a fluid and its flow?
length, time, mass, force and temperature
What are the US Customary units for length, time, force and mass?
Length: feet
Time: seconds
Force: pounds
Mass: slug [lb*s^2/ft]
What is the US Customary value for gravity?
32.2 ft/s^2
What is the relationship (equation) for mass and weight
mass (slug) = Weight (lb) / [32.2 ft/s^2]
What are the units of force and mass in the English Engineering System?
Force is poundforce (lbf). Mass is pound mass (lbm)
define: Temperature
a measure of the average energy related to the molecular motion of a substance.
define: Absolute Temperature
the temperature measured from a point where the molecules have “zero energy” or no motion.
