B Question about a physical entity (dimensional analysis)

[simplemind]

TL;DR Summary

i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
Any ideas?
thanks

i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
Any ideas?
thanks

 

[kuruman]

TL;DR Summary: i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
Any ideas?
thanks

i try to understand what physical entity mass or massdensity divided by speedquadrat could be?
Any ideas?
thanks

Massdensity per speedquadrat. What else?

 

[vanhees71]

I've no clue, what such a quantity would be good for. Do you have a reference, where it is used?

 

[jbriggs444]

i try to understand what physical entity mass or massdensity divided by speedquadrat could be?

For a given projectile shape (fixed cross section and coefficient of drag), mass divided by the square of speed would be a good figure of merit for the decelleration of a bullet.

Higher numbers mean higher effective inertia against air resistance. It is inversely proportional to the decelleration.

 

[simplemind]

Massdensity per speedquadrat. What else?

and meters per seconds is meters per seconds. what else :-)

 

[simplemind]

I've no clue, what such a quantity would be good for. Do you have a reference, where it is used?

I have already found an answer.The Thread can be closed.
thanks to all.

 

[vanhees71]

And what is the answer?

 

[simplemind]

I have no reference for it so i will not work against the rules.
But it satisfy me.
Thanks

 

[vanhees71]

Which rules? I think it's a good rule to provide the answer to a question for people who come later and read this thread!

 

[Vanadium 50]

An answer that you can't post lest it run afould of PF Rules is unlikely to be a very good answer.