Math 101 Flashcards
What is the base of ln x?
logex
what is the base of lg x
log 10 x
what powers of 10 do each of the following indicate:
centi
deci
kilo
micro
milli
nano
kilo 103
centi 10-1
deci 10 -2
milli 10-3
micro 10-6
nano 10-9
conversion factor for pounds to kg
1 kg = 2.2 lb
conversion factor for inches to cm
1 in = 2.54 cm
conversion for F to C
F = 9/5(C) +32
C= 5/9 (F-32)
How is cc (cm3) related to mL?
1 cm3 = 1 ml
1 mL = 1/1000 L
how much does 1 L of H2O weigh in kg? 1 cc?
1 L = 1 kg
1 cc = 1 gm
What are the units for pressure
1 atm =
- 33 kPa
- 3 mbar
760 mmHg
- 6 cmH20
- 7 psi
what is the concentration of in a 1% solution
1 gm/1 dl
or
move decimal place 1 to right
i.e. 2 % = 20 mg/ml
what is the concentration in 1:1,000
1 gm/1,000 ml
or 1000 mg/1000 ml
or 1 mg/ml
How is mmHg related to torr?
1 torr = 1 mmHg
what are the usual clinical units of measure for the following:
airway pressure
blood pressure
compressed gas pressure
airway = cmH2O
blood = mmHg or Torr
gas = psi(g) or kPa
what is an exponential process?
rate of change of quantity at any time is proportional to the quantity at that time?
what is a time constant?
the time at which the process would have been complete had the initial rate of change continued
time constant = volume/flow
= V/Q
What is a 1/2 life?
the time it takes to reduce the strength of a substance by 1/2
1/2 life = 0.69 time constant
what are the time constant % changes
1 = 37% (left
2 = 13.5%
3 = 5 %
5 = 0.67 %
a 50 % change in process involves how many time constants?
2
what are the base units for
amount of substance
electric current
length
luminous intensity
mass
temperature
time
amount of substance = cubic meter (m3)
electric current = ampere (A)
length = meter (m)
luminous intensity = candela (cd)
mass = killogram (kg)
temperature = kelvin (K)
time = seconds (s)
