Question

A commonly used unit of mass in the English system is the pound-mass, abbreviated lbm, where 1 lbm = 0.454 kg. What is the density of ethyl alcohol in pound-mass per cubic foot? (Assume the density of ethyl alcohol is 9.01 ✕ 102 kg/m3.)

Answer 1

Density of ethyl alcohol is 56.25 lbm/ft³

Step-by-step explanation:

We have 1 lbm = 0.454 kg

1 kg = 2.203 lbm

1 m = 3.28 ft

Density of ethyl alcohol = 9.01 x 10² kg/m³

$\texttt{Density = }\frac{9.01\times 10^2\times 2.203}{3.28^3}=56.25lbm/ft^3$

So

Density of ethyl alcohol = 56.25 lbm/ft³