The helium-filled blimp shown in fig. p1.34 is used at various athletic events. determine the number of pounds of helium within it if its volume is 68,000 ft3 and the temperature and pressure are 80 f and 14.2 psia, respectively.

The number of pounds of helium  n = 666.995 lbm

Explanation:

Given that :

the volume V = 68000 ft³

the temperature T = 80 f = (80 + 460)°R =540°R

the pressure P = 14.2 psia

Using the ideal gas equation PV =nRT to determine the number of pounds of helium within, we have :

n = PV/RT

where;

R = 2.6809 psia. ft³/lbm.R        (from the tables of A-1E for helium)

n = (14.2 × 68000)/(2.6809 × 540)

n = 965600/1447.686

n = 666.995 lbm

∴

The number of pounds of helium  n = 666.995 lbm

i'm pretty sure it is letter c.) car

the answer is 0.8m.

by: nicholas