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945 Exam 5 - Physics 1
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Gravity
Terms in this set (69)
What is the gravitational force on all objects
9.81 m/sec/sec
Scalar are a unit of measure, while a vector is
A scalar plus a direction
Force is _____ x _______
Mas x acceleration
What is the standard measuring force needed to move 1 kg wt at 1 m/sec
1 newton
What is the standard measuring force needed to move 1 g wt at 1 cm/sec
1 Dyne
1 dyne = ______ newtons
1/1000
What is the standard unit of measurement for pressure
Pascal
What is absolute pressure
Atm pressure plus gauge pressure
1 torr =
1 mmHg
1 atm = ___ Torr = ____ mmHg = 1 ____
760, 760, bar
Gauge pressure of 0 is = ______ absolute pressure
760 mmHg
Celsius to Fahrenheit =
C x 1.8 + 32
Celsius to Kelvin =
C + 273
The freezing point of water is ___ C or ___Kelvin, and the boiling point is ____ C or ____ Kelvin
0, 273, 100, 373
List the 4 areas of heat loss from least to greatest
Conduction<Evaporation<Convection<Radiation
Energy flows in a unidirectional form from higher concentration to a lower one and ends when all energy is equally distributed is called
Entropy
This is the total mass of energy possessed by a system
Enthalpy
Solid to a gas
Sublimation
Gas to a solid
Deposition
Gas to a liquid
Condensation
Solid to a liquid and liquid to a solid
Melting, freezing
List the volatiles least to greatest vapor pressures
Sevo>En>Iso>Hal>Des "See Even I Have Dildos"
The vapor pressure ______ to atm pressure = ____ vaporization
Closer, more
Vapor pressure of Sevo
170
Vapor pressure of En
175
Vapor pressure of Iso
239
Vapor pressure of Hal
243
Vapor pressure of Des
669
What are adiabatic changes
Rapid expansion or compression of a gas without equilibration of energy with the surrounding environment
Rapid expansion of a gas causes a rapid _____ in temp
decrease
Rapid compression of a gas causes a rapid ____ in temp
increase
What is the Joule-Thompson effect
Rapid expansion or compression of a gas will decrease or increase in temp
Always compare gases at STP, which is ___ temp and ___ pressure
0 C, 760 mmHg or 1 atm
Under standard conditions, ALL gases of 1 gram molecular wt (1 mole) will distend a flexible container _______
22.4 liters
This is a gas in which all collisions between atoms or molecules are perfectly elastic and there are no intermolecular attractive forces
Ideal gas
This is the equal volumes of gases under STP contain the same number of molecules
Avogadro's law
What is Avogadro's number
6.02x1023 molecules or 1 mole
How many gas molecules will be in 22.4 liters
1 mole
What is the universal/ideal gas law formula
PV=nRT (n=number of moles, R=gas constant, T=temp in Kelvin
In this law temp always stays constant
Boyle's law
What are the 3 variables in ideal gas laws
Volume, temp and pressure
A full E cylinder of O2 = ______psi, _____ liters
2100, 660
This is a law of pressure
Boyles law
Pressure always stays constant in this gas law
Charles law
Increased temp = increased volume is what law
Charles law
Increased volume = decreased pressure is what law
Boyles law
Volume always stays constant in this gas law
Gay-Lussac's law
Increased temp = increased pressure is what law
Gay-Lussac's law
For each 1 degree C increase the pressure increases _____ of the pressure @ which it existed @ 0 degree C
1/273
What is the Gay-Lussac's gas equation
Pi/Ti=Pf/Tf
Is vapor pressure a function of volume, temp or pressure
Temp
As the boiling point increases the vapor pressure
Decreases
The pressure exerted by one gas is called
Partial pressure
1 atm = ___ lb/inch2
14.7
How many PSI is 10 atm
10 x 14.7 = 147
Pressures less than 1 atm ae referred to as ____ pressures
Negative
Which law states that in a mixture of gases, each exerts its pressure independently of the other
Dalton's law
The heavier (larger) the molecule, the slower it diffuses describes which gas law
Graham's law
What law states the effusion rate of a gas is inversely proportional to the square root of its molar mass
Graham's law (Graham crackers are square)
What law states that the solubility of a gas in a liquid at a given temp is proportional to the partial pressure of the gas above the solution
Henry's law
Which gas law describes how getting decompression sickness "the bends" happens
Henry's law
Which law explains how CO2 is in soda pop
Henry's (think of Henry's hard soda)
The amount of O2 that dissolves in blood is _____ ml/___ ml blood/ mmHg partial pressure
0.003, 100
How do you calculate the amount of O2 dissolved in blood
Multiply 0.003 x partial pressure of O2 (PaO2)
How do you estimate the PaO2 if the FiO2 is given
Multiply the FiO2 x 5
The amount of CO2 that dissolves in blood is _____ ml/ 100 ml blood/ mmHg partial pressure
0.067
How do you calculate the amount of CO2 dissolved in blood
0.067 x partial pressure of CO2 (PaCO2)
The rate of diffusion is determined by what 5 factors, and what law is this
Molecular wt, concentration gradient, solubility, area, membrane thickness, Flick's law (Fick's Five)
In Fick's law, what 2 factors are inversely proportional to diffusion of a gas across a semipermeable membrane
Thickness & wt
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Verified questions
PHYSICS
A child of mass m swings in a swing supported by two chains, each of length R. If the tension in each chain at the lowest point is T, find (a) the child's speed at the lowest point and (b) the force exerted by the seat on the child at the lowest point.
PHYSICS
Two very thin circular plastic sheets are close to each other and carry equal and opposite uniform charge. Explain briefly why the field between the sheets is much larger than the field outside. Illustrate your argument on a diagram.
PHYSICS
In a collision between an electron and a hydrogen atom, why is it useful to select both objects as the system? Pick all that apply: (1) The total momentum of the system does not change during the collision. (2) The sum of the final kinetic energies must equal the sum of the initial kinetic energies for a two-object system. (3) The kinetic energy of a two-object system is nearly zero. (4) The forces the objects exert on each other are internal to the system and don't change the total momentum of the system. (5) During the time interval from just before to just after the collision, external forces are negligible.
PHYSICS
A farmer pushes his $500-\mathrm{kg}$ wagon along a horizontal level icy road, exerting a $125-\mathrm{N}$ horizontal force on the wagon.(a) Determine the acceleration of the wagon. How certain are you about your answer? What assumptions did you make? Would the number be higher or lower if you did not make those assumptions? (b) If the wagon started at rest, how fast was it moving after being pushed for 5.0 s?