
382 Forensic Engineering Fundamentals
Given our prior calculations of specic volume and ow speed, as well as assumptions of
discharge coecient and pipe diameter, the mass ow is computed to be
′
ω
π(0.98)(/)(0.5 )(221)
0.0233 lb/s
2
4
e volumetric ow rate of gas is therefore
′
=
′
V
RT
P
g
a
ω
1
0 0233 60 53 3 530
15 1775 144
18
(. )( )( .)()
(. )( )
cfm
In other words, 18
3
of gas would be released each minute.
e median walking speed of humans is around 4.0 /s, or about 240 /min. e
distance traveled from the meter base to the bedroom was approximately 240 . us, it
would have taken the owner approximately 1 min to travel to the bedroom.
Once ...