Flashcards in Fluids and Solids Deck (18):
ρ = m/V, in kg/m^3
Density of water is 10^3 kg/m^3 = 1 gm/cm^3
The ratio of substance density to that of water.
P = F/A, units = N/m^2 = Pa
1 atm = 1.013 X 10^5 Pa
Below the surface of a liquid, the pressure depends in gravity and surface pressure. Pressure depends only on the density of the liquid and it increases with depth linearly.
P = (surface Pressure) + ρg(depth)
The difference between atmospheric and absolute pressure.
Pressure applied to an enclosed fluid is passed on equally at all points within that fluid. The change in pressure is equal between both pistons of a hydraulic lever and the volume remains constant.
The buoyant force of a body in liquid is equal to the weight of liquid displaced by the body. Focus on the volume submerged.
Attractive force between liquid molecules and the molecule of another substance.
Attractive force between the liquid molecules feel with the other molecules.
Path no turbulent liquid molecules take.
Av = k
Mass flow rate of liquid remains constant throughout the tube.
Conservation of energy in fluid flow says that increased velocity (decreased cross section) means decreased pressure at constant height.
P + 1/2ρv^2 + ρgy = k
The internal friction of a fluid.
The sliding of thin layers of liquid over each other as long a the flow rate remains below critical velocity.
Random local vortices that occur beyond the boundary layer of liquids.
Solid elasticity characterized by the ratio of stress (F/A) to strain (ΔL/L) when the force is perpendicular to the surface area.
Solid's resistance to shear stress as described by the ratio of shear stress (F/A) to strain (x/h) that occurs when force is parallel to the surface area.