Physical Principles of RT Part 2.txt
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What is Pascal's principle?
P(L)=hXd(W)

P(L) is?
the static pressure exerted by the liquid

h is?
the height of the liquid column

d(w) is?
the liquid's density

1atm is equal to?
1034 gm/cm^3

1atm is equal to what in lbs?
14.7lb/in^2

When looking at the pressure at the bottom of a container, what happens to the pressure?
it doubles

psig is what of psia?
half

the formal for buoyancy?
B=d(w) X V


d(w) is?
weight density of an object being supported

V is?
the volume displaced

In order for an object to float it must have a density that is?
less than the density of water, which is 1gm/cm^3

What is it called when the weight density of other liquids are compaired to water?
specific gravity

When measureing the specific gravity of gases what should be used instead of water?
O2 or H

The force that opposes a fluid's flow is?
viscosity

A fluids viscosity is directly proportional to the _____ between its molecules.
cohesive forces

Cylindrical layers in the movement of fluids. viscosity plays an important role in the movement of the layers.
streamlines

a pattern of flow consisting of concentric layers of fluid flowing parallel to a tube wall at linear velocitied that increase toward the center.
laminar flow

How easily rings separate is the?
shear rate (the difference in the velocity between the rings)

Shear rate is depent on what two things?
pressure pushing or driving tthe fluid, shear stress and the vicosity of the fluid

What is the formula for shear rate?
shear rate = shear stress/viscosity

Shear rate is?
concentric ring separation

Shear stress is?
the driving pressure

Viscosity is?
molecular attraction

Viscosity of a uniform liquid will vary ____ with temp.
indirectly

Blood has the viscosity about _____ greater than water.
five times

What is the cgs unit for viscosity?
is the poise and is 1 dynesec/cm^2

The SI unit of viscosity is?
pascalsec. (pas) equal to 10 poises

is the attraction molecules that are alike.
cohesion

is the attration of molecules that are not alike.
adhesion

a force exerted by like molecules at a liquid's surface. it ios due to cohesion.
surface tension

What law states that surface tention increases the pressure inside a liquid drop or bubble?
LaPlace"s Law

Formula for LaPlace's Law
P= 4ST/r

water that undergoes vaporization becomes vapor, but not a true gas. this molecular water exerts a pressure like a gas called?
water vapor pressure

When gas is heated the temperature of a gas affects what on water vapor?
How much water vapor it can hole and the water vapor pressure

BTPS is know as what?
Body Temperature and pressure

Saturated BTPS is equivalent to?
37C and 100% relative humidity

Under standart BTPS the water vapor content is what?
44mg/L

The water pressure of standard BTPS is?
47 mmHg or 1 torr

The actual amount or weight of water vapor in gas.
Absolute humidity

Air saturated with water vapor with absolute humidity has?
43.8mg/L

The ratio of gases actual water vapor content to its saturated capacity at a given temp.
relative humidity

Relative humidity is calculated by using what formula?
%RH= content(absolute humdity)/saturated capacity X 100

This is the ratio of the bodies acutal water vapor content to the water vapor capacity in saturated gas at body temperature.
Percent body humidity.

What is the formula for percent body humidity?
%BH = Content(absolute humidity)/capacity at 37C X 100

represents the amount of water vapor that must be added to a gas to increase it to full saturation.
Humidity deficit

represents the amount of water vapor our body must add to the inspired gas to achieve saturation at body temperature.
Body Humidity deficit

How do you calculate humidity deficit?
humidity deficit = capacity  content