All Questions
Tagged with everyday-life pressure
101
questions
1
vote
6
answers
38k
views
Is it possible to generate electricity using a water tower?
Is it possible to build a water tower that will provide enough pressure to run an electricity generator? A water pump can be used to send water up to the tower. The water pump can be powered by solar ...
- 39
2
votes
3
answers
753
views
Can random constructive interference with sound waves cause damage?
Any two sound waves have a random chance to constructively interfere with each other at a given spot and this will cause an increase or decrease in pressure. So is it possible that a large number of ...
- 566
5
votes
1
answer
2k
views
What is the minimum pressure difference for your ears to pop?
I'm assuming the answer to this largely varies from person to person. Assuming you could instantly change the pressure around your head by amount $\Delta p$, what is the minimum $\Delta p$ for your ...
- 1,575
3
votes
1
answer
492
views
Does tapping at the side of a bottle prevent shaken soda from bubbling over?
Anecdotal evidence has it that a bottle of soda that was heavily shaken will not bubble over if tapped at the side multiple times.
Yet I wonder: Has the tapping really any effect? Or could it be that ...
- 170
11
votes
1
answer
816
views
What pressure or tension occurs in a glass jar when I pour boiling water inside?
Sometimes it happens that when you pour a boiling water into a glass jar, it cracks. Since glass is very hard material and resilient to pressure, the tension must be very high. Is it possible to ...
- 3,109
11
votes
2
answers
833
views
What if the lid of a pressure cooker was suddenly released?
My dad and I have tried to calculate the strength of the explosion if the lid was suddenly freed. We took some measures:
Lid mass: $0.7 \textrm{kg}$
Lid surface: $0.415 \textrm{m}^2$
Internal ...
- 211
3
votes
1
answer
536
views
Why does the bubbling of a soda bottle pulsate?
If I take a bottle of carbonated water and open the cap slightly to allow the gas to escape, there will be a sudden rush of bubbles foaming to the top of the liquid for a few seconds, then a partial ...
- 5,684
2
votes
3
answers
6k
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Why the pressure of atmosphere doesn't crush you when you e.g. walk outside?
Why the pressure of atmosphere doesn't crush you when you e.g. walk outside? I mean the density of air is $1.26 kg/m^3$, so with $100 km$ above us, it exerts much pressure on you when you walk outside....
- 735
31
votes
5
answers
80k
views
Why does my refrigerator door resist opening?
After closing my refrigerator's door I noticed that it's much harder to reopen it immediately, as if there's an underpressure. Only after a minute or so it opens normally. How can this be explained?
- 421
5
votes
3
answers
6k
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Get an intuition for pressure values
I am currently working with pressure differences in the milibar range. However I do not have a good feeling for pressure differences. In every day life:
Where does a pressure of say 100 mbar over ...
- 381
14
votes
5
answers
26k
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Why will crushing a partially empty 2-liter bottle keep the soda more fizzy?
One of the curses of 2-liter bottles is that when carbonated beverages are stored in them for long periods (i.e. days between drinks) at least the last liter ends up being flat. However, if after ...
- 381