What unit is weight per cubic foot typically expressed in?

What unit is weight per cubic foot typically expressed in?

• A. Pounds per cubic inch
• B. Pounds per cubic foot
• C. Kilograms per cubic meter
• D. Newtons per cubic foot

Answer: (B)

Weight per volume is called weight density, and in US customary units it’s expressed as pounds per cubic foot. Weight is a force, and the pound-force together with a cubic foot gives a convenient, standard unit for how much weight is carried per unit volume. Other options don’t fit as neatly: pounds per cubic inch would just be a much smaller volume and isn’t the common standard; kilograms per cubic meter is mass density (mass per volume), not weight per volume; Newtons per cubic foot isn’t a standard unit in common practice (the SI form would be Newtons per cubic meter). So the typical unit is pounds per cubic foot.

Weight per volume is called weight density, and in US customary units it’s expressed as pounds per cubic foot. Weight is a force, and the pound-force together with a cubic foot gives a convenient, standard unit for how much weight is carried per unit volume. Other options don’t fit as neatly: pounds per cubic inch would just be a much smaller volume and isn’t the common standard; kilograms per cubic meter is mass density (mass per volume), not weight per volume; Newtons per cubic foot isn’t a standard unit in common practice (the SI form would be Newtons per cubic meter). So the typical unit is pounds per cubic foot.