What Does Unit Weight (kN/m^3) Mean?

[tomtomtom1]

Homework Statement

What Does Unit Weight (kN/m^3) Mean?

Relevant Equations

What Does Unit Weight (kN/m^3) Mean?

Hello

This is a really silly question but I have doubted myself and I was wondering if anyone could help.

I have been given the following information:-

I am trying to understand what it means when the title states Unit Weights?

I thought these were density but density is kg/m^3 - whereas these units are kN/m^3

What does it mean to say that the unit weight of Aluminium is 24 kN/m^3

Can someone help?

Thank you.

 

[Orodruin]

Seems to be weight per volume under standard gravity. The aluminium value seems off though based on aluminium having a density of 2700 kg/m^3.

 

[PeroK]

What does it mean to say that the unit weight of Aluminium is 24 kN/m^3

Can someone help?

Thank you.

Why wouldn't that mean that a cubic metre of aluminium weighs 24kN?

Weight being a force is measured in Newtons, as opposed to mass which is measured in kilograms.

 

[Dr.D]

Unit weight simply refers to weight per unit volume. It is often denoted as lower case gamma, If rho is the density, then gamma = rho * g.

 

[tomtomtom1]

Isn't Unit Weight and Density the same thing?

 

[Dr.D]

Only if mass and weight are the same thing (which they are not).

 

[PeroK]

Isn't Unit Weight and Density the same thing?

If and when you work on constructing a colony on Mars, you'll discover the difference.