Physics 3 - Fluids Flashcards
density(p)
p=m/vunits: kg/m3
density of water?
1000kg/m3 or 1g/cm3
specific gravity?
sp. gravity= psubstance/pwater
fluid pressure equation?
P=F/a(area)units: Pascal (N/m2)
hydrostatic pressure equation?(fluid at rest,Pascal’s law)
pressure=density(p)*gy
what is atmospheric pressure?
101,000 Pa, 1 atm, or 760 mmHg
buoyant force equation?
Fb=pfluidVfluidg
the buoyant force on an object= ?
weight of displaced fluid
fraction submerged equation?
pobject/pfluid=fraction submerged
a floating object displaces volume of fluid=
to its own mass
characteristics of ideal fluid?
no viscosity, incompressible, uniform density, steady flow
volume flow rate equation?
Q=Av
Bernoulli’s equation?
v=sqrt(2gh)as velocity increases, pressure decreases.
venturi effect?
as cross sectional area decreases, velocity increases and pressure decreases (as stated in Bernoulli’s shit)
poiseuille’s law
states that a small increase in radius=large increase in flow rate.Q=deltaP(pir4)/8nL
blood flow rate is ___ throughout the body
equal
what does (+) mean?
dextrorotatory
what does the continuity equation state?
while flow rate can change, the volume displaced remains the same
what is the continuity equation?
A1v1=A2v2
what are the characteristics of laminar flow?
SHEAR FORCES, “stacking effect” so its faster in the middle and slower on the sides of the walls
how do you find the density of an object when you are given its specific gravity?
multiply the specific gravity by the density of water (keeping an eye on units)
