Fluids, solids Flashcards
Specific gravity
Ratio of its density to the density of water at 4C
Pressure equation
P= F (perpendicular)/A
Pascal’s principle equation
P1-P2= density(y2-y1)g
If we increase the pressure on the upper surface of an area, then the pressure on th elower surface will increase by exactly the same amount
A pressure applied to an enclosed fluid is transmitted equally throughout the fluid to the walls of its container
Relationship of pressure to depth
Ptotal= Patm + densitygh
Archimedes’ principle
B= density fluid x V fluid displaced x g
Buoyant force acting upon an object is equal to the weight of the fluid it displaces
Percent submerged equation
Percent submerged= density object/ density medium
Net driving force of fluid through pipe equation
F1-F2= (P1-P2)A
Continuity equation (flowing through pipe)
Q= A1V1=A2V2
where V is the average speed of the fluid
so, smaller cross-sectional area means faster speed
Bernoulli’s equation
P1+ 1/2 density v1^2 + densitygy1= P2 + 1/2 densityv2^2 +densitygy2
user friendly: k= Pagainst inner walls + 1/2 densityv^2 + densitygh
Stress equation
Sigma= Force/Area
Strain equation
Change in dimensional length/ original dimensional length
Young’s modulus Y
Slope of the linear region is the stress divided by the strain
modulus of elasticity
E=Y= Stress/Strain= (F/A)/(deltaL/L)
