Units for pressure


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Ashley Kenney 1E
Posts: 32
Joined: Wed Nov 14, 2018 12:23 am

Units for pressure

Postby Ashley Kenney 1E » Sun Feb 03, 2019 2:18 pm

When calculating work, does it matter what unit of pressure is being used? Or should we convert whatever unit of pressure we are given to atmospheres?

Ronald Thompson 1F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Units for pressure

Postby Ronald Thompson 1F » Sun Feb 03, 2019 2:22 pm

For a final answer I believe you want to use atm unless otherwise stated. You might have to do some conversions (Torr to atm)

Lasya Gudipudi 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Units for pressure

Postby Lasya Gudipudi 1A » Sun Feb 03, 2019 3:08 pm

To play it safe, I would just convert to atmospheres anytime you are asked for pressure.

SydBenedict2H
Posts: 60
Joined: Wed Nov 08, 2017 3:00 am

Re: Units for pressure

Postby SydBenedict2H » Sun Feb 03, 2019 8:08 pm

If its ever in bar, thats more or less equivalent to atm.

MichaelMoreno2G
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Units for pressure

Postby MichaelMoreno2G » Sun Feb 03, 2019 8:21 pm

SydBenedict2H wrote:If its ever in bar, thats more or less equivalent to atm.

Exactly, I remember the professor saying the difference between bar and atm is very small.

kateminden
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: Units for pressure

Postby kateminden » Sun Feb 03, 2019 8:24 pm

Yeah, I believe generally we would use atm unless a different unit was given in a specific problem.

405021651
Posts: 46
Joined: Tue Nov 14, 2017 3:03 am

Re: Units for pressure

Postby 405021651 » Sun Feb 03, 2019 8:28 pm

Usually atm is used!

Mercan Bayazit 4E
Posts: 18
Joined: Fri Sep 28, 2018 12:20 am

Re: Units for pressure

Postby Mercan Bayazit 4E » Sun Feb 03, 2019 8:29 pm

Yes, I think we generally use atm for pressure, even though the difference is small.

505211599
Posts: 60
Joined: Fri Sep 28, 2018 12:28 am

Re: Units for pressure

Postby 505211599 » Sun Feb 03, 2019 8:32 pm

You would normally use atm or bar as units in your answer.

Nicolle Fernandez 1E
Posts: 56
Joined: Fri Sep 28, 2018 12:25 am
Been upvoted: 1 time

Re: Units for pressure

Postby Nicolle Fernandez 1E » Mon Feb 04, 2019 11:09 am

You would preferably use atm but using bar is okay bc the difference between atm and bar is so small

005115864
Posts: 64
Joined: Fri Sep 28, 2018 12:15 am

Re: Units for pressure

Postby 005115864 » Mon Feb 04, 2019 11:16 am

Refer to the constants and go from there. If the problem gives you torr, and whatever constant you're using uses atm, then make sure to use atm in order to be able to cancel them out properly.


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