Quiz - Physics - Gauge Pressure

[Couv]

Please don't confuse "gauge pressure" with the readings on a pressure gauge. The term "gauge pressure" assumes accuracy of an instrument and is related to what a theoretically perfect instrument would read given a certain pressure. To say anymore would be a spoiler.

 

[scubadada]

Follow up question:
What depth will your typical depth gauge or computer read?

What water type is your computer set for, fresh, salt, or EN13319? It will measure somewhere around 53 ft.

 

[Couv]

What water type is your computer set for, fresh, salt, or EN13319?

I think you picked up on my trick question-but your answer to my question is incorrect. FWIW, my computer is, as are most computers and depth gauges, set to salt water. Most computers and depth gauges are themselves pressure gauges that read in feet or meters of saltwater. Hence the term "typical."

 

[scubadada]

I think you picked up on my trick question-but your answer to my question is incorrect. FWIW, my computer is, as are most computers and depth gauges, set to salt water. Most computers and depth gauges are themselves pressure gauges that read in feet or meters of saltwater. Hence the term "typical."

My computer will read 53 feet as I would set it for freshwater. Your computer, set to saltwater, will read about 51.4 ft

 

[rhwestfall]

as are most

So happy to once again be an outlier.

 

[Couv]

My computer will read 53 feet as I would set it for freshwater. Your computer, set to saltwater, will read about 51.4 ft

Ding, ding, ding!

 

[scubadada]

Ding, ding, ding!

Thanks Aqualung, my friend

 

[Ukmc]

I like this question. Tests both gauge pressure vs absolute pressure and msw vs mfw. Agree with @Steve_C that no complex Math is required if one knows that sw is heavier than fw.

 

[wetb4igetinthewater]

I answered c as "Gauge pressure is the pressure relative to atmospheric pressure. Gauge pressure is positive for pressures above atmospheric pressure, and negative for pressures below it."

 

[tursiops]

I answered c as "Gauge pressure is the pressure relative to atmospheric pressure. Gauge pressure is positive for pressures above atmospheric pressure, and negative for pressures below it."

What does that definition have to do with (c)?