1. Formulas

Question 1

Molarity

Answer 1

M = n / V
n: mols of solute
V: liters of solution

Question 2

Velocity Pressure (air)

Answer 2

VP = (V / 4005)^2

VP: in. w.g. (inches of water gauge)
V: velocity ft/min

Question 3

in w.g. to atm

Answer 3

1 in w.g. = 0,0025 atm

Question 4

Reduced Noise Level

Answer 4

RNL = NL - [(NRR-7) / 2]

NL: noise level dB
NRR: noise reduction rating dB

Question 5

Work

Answer 5

W = F x d

W: Joules
F: force N
d: meters

Question 6

Momentum

Answer 6

p = m * v

p: momentum kg.m/s
m: mass kg
v: velocity m/s

Question 7

Stay Time (radiation)

Answer 7

ST = Dose / Dose Rate

ST: Stay time h
Dose: mrem
Dose Rate: mrem/h

Question 8

Remaining Radioactive Mass

Answer 8

N(t) = N0 * (1/2) ^ (T/HL)
N(t): g
N0: Original mass g
T: time interval years
HL: half life of the source material, years

Question 9

What is Half-Life? (radioactivity)

Answer 9

the time taken for the radioactivity of a specified isotope to fall to half its original value.
“iodine-131 has a half-life of 8.1 days”

Question 10

Friction Force

Answer 10

F = f * N
f: friction coefficient
N: Normal force

Question 11

Force to lift a load with pulleys

Answer 11

F = (W / n) * (1 + i)^n

W: weight of load
n: number of pulleys
i: friction loss of pulley

Question 12

Sound Pressure Level (simultaneously sounds)

Answer 12