Fluid Density, Pressure, and Hydrostatic Pressure Flashcards
What is the specific gravity or density of water?
1 kg/L
Accurate equivalent measures of atmospheric pressure?
1 atm = 760 mm Hg = 10^5 Pa
Equation of total pressure?
Ptot = Patm + rho g h
Rho: density
G: acceleration due to gravity
H: depth/height
What is systolic blood pressure relative to?
That many mm Hg higher than atm pressure around the person
What is spec gravity?
Density of liquid / density of water
- water is g / mL
What is the unit of pascal?
N/m^2
Formula for hydrostatic pressure
Rho * g * h
Why does a feather sink and a rock float?
Feather has lower density than water, or lower specific gravity and opposite for rock
How can you calculate % submersion?
Density of object / density of liquid *100
What are two different units of tension? How do you minimize tension?
F / Length = N / m
Energy / Surface area
- by minimize surface area
What forms when cohesion > adhesion?
Convex meniscus like Hg
What happens when adhesion > cohesion?
Concave meniscus like water and most substances
What are the intermolecular forces of methane like?
They are weak cohesive wise, so probably have strong adhesive forces and have more pronounced concave meniscus
What is an experimental procedure that utilizes capillary action?
Thin layer chromatography
