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Balloon in a bag - measuring pressure
#5
(12-26-2021, 02:58 PM)solid Wrote: Eric,

I have not used my SensorTag for this experiment, I used my phone 7x13.5 cm.
I used a standard balloon but from another supermarket shelf...

I think the additional peaks are due to jumping of the phone inside the bag. What I expect and do not see it is a pressure razing inside the bag. I will repeat your experiment if I will find a sufficiently hermetic bag ...

Nice vacations
Mikhail

Thank you Mikhail! I would never have tried to put the phone inside the balloon if you had not done it.

The whole purpose of the putting the balloon inside the bag was to figure out a way to measure the pressure inside the balloon without having to put the phone inside the balloon. I just though, without trying, that was not possible!

Turns out it was possible, and my phone says the pressure was 1049.27 hPa at 47.21 seconds and 1012.76 hPa at 47.25 seconds. Average pressure in the room during 9.2 seconds after the pop was 1012.68. It took about one minute from start to stop.

I found a student paper on balloon pressure measurements which shows a similar result. Their balloon pops at around 30 hPa above room pressure (see figure 4 page 6).

Remains to explain why I only got a 2 hPa peak out of a 35 hPa balloon...

Best regards.

//Erik


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Messages In This Thread
RE: Balloon in a bag - measuring pressure - by Erik Josefsson - 12-27-2021, 04:09 AM

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