Quiz - Physics - Partial Pressure of Nitrogen

[Pedro Burrito]

From the Physics Section of the PADI Dive Theory Exam:

If an air filled balloon is taken to a depth of 20m/66ft, what is the approximate partial pressure of nitrogen in the balloon?

a. .8 ATA/12 psi

b. 1.6 ATA/23 psi

c. 2.4 ATA/35 psi

d. The answer cannot be determined from the information given.


I will post a daily question from my exams to help newer divers and to encourage more experienced divers to interact gracefully and helpfully with the newer divers.

Reminder - this is a post in the Basic Forum and it is a green zone. Please be nice and on topic.

Thank you for your patience while we try to give people something to discuss other than Covid-19 and/or Politics. I will post the answer covered by the spoiler tag later today.

 

[Pedro Burrito]

I am expecting good things from this question!

 

[BlueTrin]

I am expecting good things from this question!

“Good” as very lengthy over many pages ?

Edit: I am with the majority since I am the first person to vote.

 

[BlueTrin]

Ok I will start:

Is it a normal balloon or this kind of balloon ?

Lead Balloon - Laura Such

 

[Jcp2]

I can see why metric is better than imperial when it comes to these sorts of calculations. It’s a good excuse to browse for a new to me SPG.

 

[Storker]

From the Physics Section of the PADI Dive Theory Exam:

If an air filled balloon is taken to a depth of 20m/66ft, what is the approximate partial pressure of nitrogen in the balloon?

a. .8 ATA/12 psi

b. 1.6 ATA/23 psi

c. 2.4 ATA/35 psi

d. The answer cannot be determined from the information given.


I will post a daily question from my exams to help newer divers and to encourage more experienced divers to interact gracefully and helpfully with the newer divers.

Reminder - this is a post in the Basic Forum and it is a green zone. Please be nice and on topic.

Thank you for your patience while we try to give people something to discuss other than Covid-19 and/or Politics. I will post the answer covered by the spoiler tag later today.

Unless the student is supposed to know the composition of air, the answer is d.

Again a good illustration of why it's difficult to make good exam questions.

 

[Scared Silly]

Ok I will start:

Is it a normal balloon or this kind of balloon ?

Lead Balloon - Laura Such

That will go down like a bloody led zeppelin.

 

[HKGuns]

Crap

 

[Jcp2]

But as this question is in the context of a course that states what the composition of air is in other materials, it’s an unstated expected point of knowledge. When you take a test regarding calculations, do you ask first if you are working in base 10 or hexadecimal?

 

[BlueTrin]

Crap

Are you the single vote for d) ?