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Physics Flashcards

1
Q

Critical temperature

A

Temperature above which, no matter how much pressure apply cannot liquefy a gas

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2
Q

Pseudocritical temperature

what is it

what does it normally describe

whats the temp of that gas

A

Crit temp mix gas, 50:50 mix O2 & Nitrous seperates

-7-5.5 depending on pressure

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3
Q

Clark / Poloragaphic electrode

A

Platinum anode silver cathode & external power source

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4
Q

Galvanic

A

Gold & lead - own power

Current generate is proport to PP O2

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5
Q

Pouiselles

A

Q = ΔPπr4/8Lη

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6
Q

Frequency wavelength velocity formula

A

λ = v/f

frequency (f), wavelength (λ) and velocity (v) is as follows:

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7
Q

gauge pressure

A

Amount by which the pressure measured in a fluid exceeds that of the atmosphere
Dir releate to SVP & temp
(not Volume, weight or pressure)

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8
Q

Radioactivity unit & define

A

Becquerel Disintegration of 1 nucleus every second

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9
Q

Force =

A

Mass x acceleration

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10
Q

Capacitance =

A

Charge / voltage

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11
Q

Kinetic energy=

A

1/2 mass x velocity^2

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12
Q

Charge =

A

Potential x capicatance

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13
Q

7 Fundamental SI units

A 
Second
Metre
Mole
Ampere
Candela
Kelvin
Kg
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14
Q

Second is

A

Frequency of radiation Caesium 133

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15
Q

Metre is

A

Length light travel in vacuum during specified fraction second

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16
Q

Mole is

A

Amt of substance contain elementary many particle as atoms 0.012kg C 12

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17
Q

Ampere is

A

Current prod force 2 x10-7 n/m between 2 conductor 1m apart in vacuum

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18
Q

Candela is

A

Luminous intensity - perfect black body @ spec high temp

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19
Q

Kelvin is

A

Fraction 1/273.16 thermodynamic temp of triple point of h2o

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20
Q

Kilogram is

A

Defined international prototype at Sevres

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21
Q

4 derived electricity units

A

Volt
Ohm
Coulomb
Farad

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22
Q

7 derived Non electrical unit

A 
Hertz
Pascal
Acceleration
Newton
Joule
Electron volt
Watt
Celsius
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23
Q

Volt is

A

Electric potential

1v = diff electrical potential between 2 points of conduct, carrying current 1 ampere power dissipated 1 watt

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24
Q

Ohm is

A

Electrical resistance

Potential 1 volt apply across conductor & produces 1 ampere resistance = 1 ohm

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25
Coulomb is
Unit charge / quantity electricity | 1 coulomb quantity electricity transported in 1s by 1 ampere
26
Farad is
Capacitance | 1 farad capacitor potent difference 1 volt present across plates - charge 1 coulomb held
27
Hertz is
Frequncy | 1 cycle per second
28
Newton
Force | 1 newton give mass 1 kg & accel 1 metere per second per seocnd
29
Pascal
Pressure | Pressure of 1 newton per square metere
30
Joule
Unit energy / work | expended point of application of force 1n move 1 metre - direction force
31
Electronvolt
Unit energy typer electromagnetic radiation | Energy - move 1 electron through ptoetnial difference 1 volt in vacuum = 1.6 x 10-19 joule
32
Watt
Power | Rate energy expenditure 1 watt = 1 joule/sec
33
Celsius
Temperature 1 degree identical 1 kelvin 1 Celsius = 1kelvin -273.15
34
What is STP
101.325 Kpa & 273.15 K
35
Avogadro's Hypothesis
Equal volumes of gas at STP contain equal numbers of moles | Mol wt may differ - but no molecules same
36
Oxygen | Crit temp, cylinder, % o2 at altitude
Crit temp - cannot be liquefied no matter how much pressure -118.6 (cannot be liquefy at room temp) Black cylinder white shoulder Same % O2 at altitude, PP reudced
37
OHMs law
Pot diff = Flow x Resistance V = IxR R = V/I
38
PVR =
MPAP − PCWP / CO × 80
39
Seebeck effect
Potential difference (V) @ 2 conductor - proport to temp
40
Thermistor
Resistance falls exponentially as temp rises
41
Platinum resistance wire
resistance increases linear w/ temperate
42
Coanda Effect
Development reduced pressure between fluid jet from nozzle & adjacent surface Jet adhering to surface Control mech in vent
43
Fick principle
calc blood flow / unit time to any organ | Measure CO
44
Turbulent Flow calculation
Q =r2. √ΔP/L.density Therefore turbulent flow is proportional to: The radius ^2 The square root pressure gradient and Is inversely proportional to length and the density of the fluid
45
Reynolds number
Flow becomes turbulent, inverse to viscosity Re >2000 - turbulence likel Re -2000-4000 transitional flow
46
PAC Est w/ CO
Thermodilution inject cold solution smoothyl over 4s AUC temp change @ dist end of thermistor
47
PAC Est w/ CO
Thermodilution inject cold solution smoothyl over 4s AUC temp change @ dist end of thermistor
48
Damping | Factors
Progressive decrease in amplitude of oscillation d/t dissipation energy Undamped = 0 Crit damp = 1 Optimally damp 0.64
49
Resonant
Driving force frequency coincides w/ resonant freq system tubing too long / stiff Diaphragm may also be too stiff
50
Impedence
When resistance depends on frequency
51
Capacitor
Stores energy in electrical field. Resist instant change volatge doesnt conduct DC
52
Beers law
Absorption of radiation - given thickness solution - given conc - same twice thickness of a solution of half the concentration
53
Bougner's or Lambert's Law
Each layer of equal thickness absorbs an equal fraction of radiation which passes through it
54
Boyles law
Constant temp volume gas inverse proport to abs pressure
55
Grahams Law
Rate diffusion gas Inverse proport to square root molar weight
56
Raoult
Depression / Reduction vapour pressure of solvent proportional to molar conc solute
57
Art line frequency
0.5 - 40Hz
58
Nautral frequency
frequency at which the monitoring system itself resonates amplifies signal should be at least x10 fundamental frequency. The natural frequency is directly related to the catheter diameter (not indirectly). It is inversely related to the square root of the: system compliance, length of tubing and the density of the fluid in the system.
59
Doppler effect
Apparent change in frequency | cause by movement of object in `relation to source
60
Bernoulli principle | utilised
``` Increase in the flow velocity of an ideal fluid will be accompanied simultaneous reduction in its pressure Fluid logic ventilators Gas driven nebulisers Jet ventilation devices Venturi oxygen mask ```
61
How does a thermocouple work
bimetallic strip has a junction potential proportional to temperature

Physics (11 decks)

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