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Acceptable pressure units

Anonymous Tue 02 Feb 21:58:34 2021 No.12659209 View Reply Original Report

Quoted By: >>12659251 >>12659252 >>12659645 >>12660251

Are the units: kg/m^2
acceptable for depicting pressure? I recognize they aren't common, but surely they're fine?

Anonymous

Anonymous Tue 02 Feb 2021 22:04:04 No.12659251 Report

Quoted By: >>12659294 >>12660251 >>12660647

>>12659209
Not the right dimension, a pressure is a force over a surface, not a mass over a surface. You're missing an acceleration.

Anonymous

Anonymous Tue 02 Feb 2021 22:04:05 No.12659252 Report

Quoted By: >>12659294 >>12660251

>>12659209
mass over area?

Anonymous

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Anonymous Tue 02 Feb 2021 22:10:58 No.12659294 Report

Quoted By: >>12659342

>>12659251
>>12659252
In the context of calculating hydrostatic pressure?:
metres * kg/m^3 = kg/m^2

Anonymous

Anonymous Tue 02 Feb 2021 22:17:32 No.12659342 Report

Quoted By: >>12659465 >>12660647

>>12659294
still missing acceleration, i.e. P = rho g h for example. what is this textbook youre referencing

Anonymous

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Anonymous Tue 02 Feb 2021 22:34:48 No.12659465 Report

Quoted By: >>12659545 >>12659621

>>12659342
Human Physiology by Sherwood (see pic related)

Anonymous

Anonymous Tue 02 Feb 2021 22:50:31 No.12659545 Report

Quoted By:

>>12659465
Maybe that's acceptable in the field of medicine...but in phys/chem they are not accepted.

Anonymous

Anonymous Tue 02 Feb 2021 23:05:57 No.12659621 Report

Quoted By: >>12659658

It's acceptable in the context of medicine. I mean, it's a more visualizable unit for doctors and other retards. It assumes standard g acceleration which is the case 99.999999999999999+% of the time anyway. But I do wonder if it's a forced metric analogy of PSI for that
>>12659465 Canadian Edition. PSI is pounds per square inch. American units don't differentiate between mass and weight (force), they just assume Earth g.

Anonymous

Anonymous Tue 02 Feb 2021 23:10:33 No.12659645 Report

Quoted By: >>12660710

>>12659209

Reasonably kg/m^2 is an acceptable measurement of pressure.

Anonymous

Anonymous Tue 02 Feb 2021 23:13:21 No.12659658 Report

Quoted By:

>>12659621
They do actually, usually lb_f and lb_m for pounds of force and pounds of mass. At standard g, lb_f = lb_m of course so in most cases it is just up to context of whether to differentiate

Anonymous

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Anonymous Wed 03 Feb 2021 01:26:57 No.12660251 Report

Quoted By:

>>12659209
>>12659251
>>12659252

kek, OP is calculating the density of a two-dimensional piece of graphite

Anonymous

Anonymous Wed 03 Feb 2021 03:39:17 No.12660647 Report

Quoted By:

>>12659342
>>12659251
stop being dense. kgf/m^2 IS in fact a quantity of pressure.
nobody uses it because atmospheric pressure would be much less than 1 in these units, making them a shit choice. SI people use kilopascals, bar, millimeters of mercury, while americans use psi and inches of mercury, but all of which assign a reasonable value to 1 atm.

Anonymous

Anonymous Wed 03 Feb 2021 04:01:49 No.12660710 Report

Quoted By:

>>12659645
wrong because what if your kg is on the moon or jupiter?

Anonymous

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Anonymous Wed 03 Feb 2021 18:18:33 No.12662840 Report

Quoted By: >>12663439

F/A isnt that just m

Anonymous

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Anonymous Wed 03 Feb 2021 21:23:35 No.12663439 Report

Quoted By:

>>12662840

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