Quiz - Physics - Partial Pressure of Nitrogen

[Couv]

Don’t put the spaces in the spoiler tags, I put them so you can see them.

Thanks-that's what I get for being lazy and using cut and paste.

 

[TMHeimer]

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.

I agree. But even with imperial, this question was easy enough for me to figure out without a calculator.

 

[Pedro Burrito]

Spoiler: Answer

c. 2.4 ATA/35 psi

 

[elmo]

As a pedant I'm wondering why the metric answer uses the non-metric unit of ata, rather than bar.

 

[BackAfter30]

For this question, metric/Imperial is irrelevant. In Imperial world you know 33ft/atm, just as well as you non-Central-Norte-Americanos know 10m/atm. anyone who can't do 66/33 in their head has bigger problems than trying to decide whether to use metric or Imperial.

 

[-JD-]

As a pedant I'm wondering why the metric answer uses the non-metric unit of ata, rather than bar.

Actually I'm wondering why they bothered with psi at all. ATA wors for both.

 

[Brett Hatch]

As a pedant I'm wondering why the metric answer uses the non-metric unit of ata, rather than bar.

In my scuba courses, I was taught that 1) bar and ata are different units, and 2) they are close enough that divers often use them interchangeably. Since then, I have observed this to be the case all over the place. In practice I don't think any of my scuba tools are precise enough for a 1% difference to even have meaning, let alone be actually useful.

It would not surprise me to find that differences on this order of magnitude can add up to meaningful, actionable information on very deep or very long dives. But I don't do very deep or long dives, so I don't know.

Speaking here, of course, also as a pedant .

 

[Storker]

a 1% difference

A 1.3% difference

 

[BlueTrin]

A 1.3% difference

He didn’t say 1.0% difference

 

[aviator8]

PP of O or PP of N?