Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Work And Dr Pod > Definitions And Quick Facts > Flashcards

Definitions And Quick Facts Flashcards

1
Q

Define meter

A

SI base unit for measurement where 1 m is the distance travelled by light in a vacuum in a fixed time period. (1/3millonth of a second )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the SI base unit for time ?

A

The second is the SI base unit for time. It is defined based on the frequency of radiation emitted from caesium 133

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the SI base unit for mass , define this?

A

Kg
Used to be defined compared to an object in Paris
Now compared to the second and meter using planks constant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Define 1 mole

A

1 mole defines the number of particles in 12g of carbon 12 which is 6.022x10^23. 1 mole of any substance contains this many particles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the SI base unit for temperature. Define this

A

Kelvin
1 kelvin is defined as 1/273.16 the thermodynamic temp of the triple point of water
0 kelvin is absolute 0 where all motion / entropy of a system ceases

Now defined by botzman constant which is an objects energy based on kg, meters and seconds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Define ampere

A

The SI base unit for electrical current
Where 1 ampere is the current required to produce a force of 2x10^7 N of force when 2 wires of infinite length are 1 m apart in a vacuum.
Also defined by amount of charge passing a point per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Define candela

A

The SI base unit for luminous intensity of light
Based on the luminous intensity in a given direction of a source that emits monochromatic radiation in a specified frequency and intensity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What SI derived units for mechanics do you know

A

Force N = kg x m/s2. 1 N is the force required to accelerate 1kg by 1m/s2

Pressure = pascal. N/ m2

Energy = joules = N.m force x distance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What derived units of electricity do you know

A

Power (watts)= joules / second

Charge (Coloumb) = ampere x second

Volt = watts / amp = measure of potential difference

Farad = unit for capacitance. 1 farad stores 1 coloumb of charge when 1 Volt is applied
F = C/V C is coloumb

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What other units are there for pressure , what are the conversions

A

Pascal = SI unit

100kpa =

1020 cmH20
750 mmHg
1 Barr
14.6psi

1atm = 101.325 kpa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is dyne

A

Measure if pressure
10,000 dyne = 1k pa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

State the standard temp and pressure

A

1atm
0 degrees C (273.15 kelvin )

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How much energy in 1 calorie ?

A

4.18 joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Specific heat capacity of water

A

4.18 joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What factors effect rate of diffusions

A

Ficks law
Grahams law
Temp

Ficks = area x conc diff/ thickness
Grahams = 1/ root MW
Temp increases rate of diffusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What factors effect rate of diffusions

A

Ficks law
Grahams law
Temp
Solubility of a gas in a solute

Ficks = area x conc diff/ thickness
Grahams = 1/ root MW
Temp increases rate of diffusion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What affects solubility of a gas in a liquid ?

A

Molecular weight
Properties of gas and liquid e.g ability to make molecular interactions
Partial pressure of air in equilibrium- henry
Temp - reduces gas in liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Define Henry’s law

A

States at a specific temp the amount of gas dissolved in a liquid is proportional to the partial pressure of gas in equilibrium with that liquid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Define critical temp

A

Temperature at which a gas can not be liquified regardless of the pressure applied. Above this, the substance is said to be a gas and below a vapour

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

SVP for all inhalation agents..

A

sevo =22.5
iso = 33
en = 23
halothane = 32
desflurane = 89
xenon = high
N20 = 5200

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Boiling point of inhalation agents

A

sevo = 59
iso = 50
en = 60
halothane = 50
desflurane = 23
xenon = -108
N20 = -88

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

MAC of all inhaled agents

A

sevo =2.0
iso = 1.17
en = 1.7
halothane = 0.75
desflurane = 6.6
xenon = 70
N20 = 103

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

B:G of inhaled agents..

A

sevo = 0.7
iso = 1.4
en = 1.9
halothane = 2.5
desflurane = 0.42
xenon = 0.14
N20 = 0.47

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

O:G for inhaled agents

A

sevo =47
iso = 90
en = 98
halothane = 225
desflurane = 26
xenon = 1.9
N20 = 1.4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

define boyles law

A

one of the ideal gas laws
states that at a set temp pressure is inversely proportional to volume
P ∝ 1/V

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

define charles law..

A

one of the ideal gas laws that states at a constant pressure
volume is directly proportional to temp change
V ∝ T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

define gay lussacs law..

A

one of the ideal gas laws that states at a constant volume, pressure is proptional to temp change

P ∝ T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

what is the universal gas law?

A

PV = nRT
where n = number of moles
R= universal gas constant 8.31J/K/mol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what is a perfect gas..

A

a gas that obeys all 3 laws
molecules are infinitely small size with no volume
no force of attraction between them

Hydrogen is closest
however other gases obey laws relatively well.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what is avogadros principle?

A

1 mole of any gas will occupy 22.4L at standard temp and pressure.

31
Q

define standard temp and pressure

A

1 atm
273.15 K (0 degrees)

32
Q

how does a hot air balloon work?

A

heat the air
increases volume
less dense
air rises

charles law

33
Q

define daltons law..

A

daltons law of partial pressures states that each gas exerts a partial pressure of its own in a mixture and the total pressure of a gas mixtures is a sum of individual partial pressures.

34
Q

what is the kinetic gas theory?

A

model for an ideal gas
gases are moving randomly with kinetic energy
there volume is a lot smaller than volume between them
they travel in straight lines but may collide with eachother and walls of container
no attractive foces

35
Q

what is the formula for kinetic energy?

A

kinetic energy = 1/2 m v^2
mass x velocity squared

36
Q

why is N20 liquidified at room temp but not O2…

A

critical temp N20 = 36.5
O2 = -119

need to cool and apply pressure to liquidify O2
only need to apply pressure to liquidify N20

37
Q

critical temp for CO2

A

30 degrees

38
Q

critical pressure for O2, N20 and CO2

A

N20 = 72 bar
O2 = 50bar
CO2= 73 bar

39
Q

define the triple point of water..

A

point at which all phases of water - solid, liquid and gas are in equilibrium

occurs at 0.01 degrees, 611kpa (0.006atm)

40
Q

state ficks law of diffusion..

A

rate of diffusion ∝ A (Conc dif) / D

A = area
D = distance / thickness

41
Q

state grahams law..

A

diffusion of a gas ∝ 1/ root MW

42
Q

what is an adiabatic process

A

if a gas expands quickly it hasnt got time to take heat from surrounding so instead it cools
e.g. cryroprobes - N20 or CO2

43
Q

boiling point of O2, N20 and CO2

A

-183 O2
- 88 N20
- 80 CO2

44
Q

define temperature

A

Average kinetic energy of a substance
≈ intensity of heat present in a substance

45
Q

define heat

A

Total kinetic energy of a substance

46
Q

define a coloumb

A

SI unit for charge
where 1 coloumb is equivalent to 6.24x10^18 electrons

or the charge that passes a point when 1 ampere of current flows for 1 second

47
Q

define charge

A

a property of a particle/object that causes attraction/repulsion to other charged objects
usually comes from imbalance of electrons/ protons

48
Q

define resistance

A

the opposition to flow
this may be opposition to flow of current in electrical circuits
or opposition to flow of fluid

in electricity its measured in ohms
where 1 ohm is the resistance present when 1 V produces 1 amp of current.

49
Q

define current

A

measure of flow of charge i.e. coulombs/ sec

measured in ampere which is the SI base unit.
1 ampere is the current required to produce 2x10^-7N of force when 2 wires are 1 meter apart in a vacuum of infinite length

current can be AC or DC

50
Q

define voltage

A

this is the potential difference and the driving force for current.

1 volt is the energy required to move 1 coulomb of charge between 2 points
V = J / C

also related to amps and wats via W= AV

51
Q

what is impedence

A

sum of reactance and resistance in AC circuits.

measured in ohms

51
Q

what is reactance

A

the opposition to flow of AC current
sum of inductance and capacitive reactance

measured in ohm,s

52
Q

define power

A

the rate at which work is done
measured in watts
where watts = joule / sec

53
Q

define magnetism

A

a physical property associated with the motion of electrical charge in a material.

it has the ability to allign with other magnets or induce ferromagnets.

54
Q

define a ferromagnet

A

a material that exhibits strong magnetism due to allignment of magnetic moments with a magnetic field

55
Q

define magnetic flux

A

the strength of a magnetic field
measured in weber

56
Q

define magnetic flux density

A

strength of a magnetic field per unit area
wb / m2
= Tesla

57
Q

define a weber

A

weber is a unit of magnetic flux
whereby 1 weber produces 1 volt if a coil of wire with 1 turn were allowed to decay over 1 second

58
Q

what is meant by dimagnetic and paramagenetic

A

dimagnetic - material that is not magnetic / repelled by magnetics

paramagnetic - materials weakly attracted to a magnetic field

59
Q

define inductor

A

Ability for a coil of wire to produce a backwards EMF that resists the flow of current when exposed to changing current

measrued in henry

60
Q

define capacitance

A

ability for a component to store charge
measured in farads
farads is the charge stored per voltage applied to a capacitor

61
Q

define henry

A

SI derived unit for inductance
where 1 henry is the inductance that produces a magnetic field of 1wb is produced from 1 ampere of current

62
Q

define transistor

A

a piece of electrical equiptment that allows flow of current if there is current flowing in a 3rd limb

can act to control current flow

63
Q

d

define a battery

A

consists of collection of cells which contain 2 half cells and convert chemical energy to electrical energy

64
Q

define SVP

A

the pressure of the vapour phase of a substance in equilibrium with its liquid phase at a specified temp

65
Q

define critical pressure

A

the pressure that is required to liquify a substance at its critical temp

66
Q

define boiling point

A

the point at which the SVP equals the atmospheric pressure

hence either boils if increase temp or reduce atm pressure.

67
Q

define partition coefficient

A

a ratio of the amount of substance in one phase compared to another when 2 phases are of equal volumes, at equal temp and pressure and in equilibrium.

for O:G - at 37 degrees relates to potency
for B:G at 37 degrees relates to speed of onset

68
Q

define mac

A

minimum alveolar conc

conc of agent that prevents 50% of subjects aged 40 responding to a standard surgical incision when breathing 100% O2 at 1atm with no other anaesthetic agents.

69
Q

define calibration

A

comparison of an individual measuring device with a reference of known true values.

70
Q

define drift

A

a loss of calibration overtime.
needs to be recalibrated

a fixed deviation from the true value

71
Q

define acuracy

A

the ability for a measurement device to match the actual value

72
Q

precision

A

the reproducibility of repeated measurements and their measure of spread

73
Q
A

Work And Dr Pod (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions