Pt 2 Flashcards
Name the three states of matter
Gases
Liquids
Solids
The state, or phase, of matter of a particular Substance is strongly influenced by what two conditions
Temperature
Pressure to
A gas has no____ volume or _____
Definite volume or shape
A liquid has a______ but no ______
Definite volume but no definite shape
A solid has a ______ and a ____
Definite shape and volume
Atoms are made of of three types of particles, name them
Electrons
Protons
Neutrons
What is a molecule?
is the smallest particular of matter that retains all the properties of a particular substance
What molecules of a solid are packed together because they have a strong ______ forces
Cohesive
Define temperate
It is the measurement of kinetic energy of an object
The measurement of mass is typically expressed in units of____
Weight
Volume refers to ____
The amount of space that matter occupies
Define density
Is defined by mass per unit volume
What is elasticity
Is the tendency of solids to return to their original shape after being deformed from stress
List the five basic types of stress
Tension Compression Bending Twisting Sheering
What is elastic limit
Is the point at which the force applied to a solid exceeds the ability of the solid to return to its original shape
What allows liquid to flow
The free movement of liquid molecules
Define viscosity
The resistance to flow
What causes some liquid to cling to the walls of the container because of what forces
Adhesive forces
Capillary is a result of what action
Adhesive and cohesive forces
Define Boyles law
Stats that at a given temperature, the pressure of the gas varies inversely with its volume
Define Charles law
At a given pressure, if there is an increase in the temperature of the gas, there will also be an increase in the volume of gas
What is the general gas law
If a certain amount of gas is confined in a given volume and the volume is decreased, both the pressure and the temperature will increase
Air compressors usually use a _____
Cooler
What is atmospheric pressure
Is a mixture of gases that completely surround the earth
14.7 psi = 30 inches of mercury so 1 inch of mercury = ?
.49 psi or 1/2 psi
What is a barometer
It is a device used to measure atmospheric pressure
What is PSIG
It is pressure per square with out accounting for atmospheric pressure
What is PSIA
It is pounds per square inch plus atmospheric pressure
What is PSIV
It is pressure below atmospheric pressure
What does 1 in. Hg=
.49 psi
What is inches of mercury ( in. Hg) used to measure?
When pressure is below atmospheric
Is atmospheric pressure the same every where?
No
List three scales commonly used to measure pressure in a plant
Absolute scale
Gauge scale
Vacuum scale
Convert 73.7 psia to psig
59psig
Convert 50 psig to psia
Psig 50 + 14.7 (amp) =
64.7 psia
Convert 5 psia to psiv
Psia 5 - 14.7 (amp) = 9.7 psiv
Flow occurs when?
Flow occurs when a given amount of fluid moves past a given point
Define flow rate
Is the amount of fluid flowing past a given point per unit
What is the flow rate equation
Rate = area x velocity
