All Questions
12
questions
0
votes
1
answer
762
views
Does a tire deflate more quickly when not in use and why? [closed]
Answers from a google support the obvious; that tires goes flat when not in use, but when you read the answers carefully they allude more to that - yes a tire can still go flat when not used. My ...
4
votes
2
answers
5k
views
Why does the "air" close or open doors?
Assume we have an empty room with two doors on the opposite sides of it. If we open one of the doors, the door on the opposite side automatically closes "harder", and if we close one of the doors the ...
- 676
1
vote
2
answers
220
views
Thought Experiment: If you fell out of a plane at 36,000 ft (11km), would the additional air pressure from falling allow you to breathe?
Imagine you fell out of a plane at 36,000 ft (11km), roughly cruising altitude, with a parachute. If you deployed your parachute immediately, you would be stuck at high altitude with no oxygen, and ...
- 2,714
0
votes
1
answer
2k
views
Why is it sometimes hard to open the jar?
The thing that all of us have experienced is about some stubborn jars!
Does anyone know what's the reason?I think it might be related to air pressure but I don't know how to explain it!
Edit:
Right I ...
- 121
4
votes
1
answer
309
views
Is there an ideal proportion for water to air in an espresso machine?
Let's imagine a very simplified espresso machine, and let's ignore the pump etc. and focus simply on the boiler. This is a metallic cylinder containing water, with a heater at the bottom, and a pipe ...
- 787
2
votes
0
answers
467
views
Apartment house ventilation: will adding supply air solve tobacco smell problem? [closed]
For at least two years our life quality has been significantly reduced because our upstairs neighbor is a chain smoker and the smell is coming down to our apartment through ceiling structures. I've ...
- 29
3
votes
1
answer
7k
views
If my windows are open on a windy day, the curtains sway and the doors slam shut. Why don't I feel this wind?
I am standing indoors, right in front of my open window, as I see my curtains moving back and forth and I can hear my closed doors shaking. I can also hear the wind howling loudly.
Why don't I feel ...
- 133
0
votes
0
answers
31
views
Loud, low-frequency "booming" sound in car [duplicate]
I drive a Scion XD, and I've noticed that whenever I drive at about 40mi/hr or so with just the back windows rolled down, I get a loud "booming" effect at roughly 10Hz. What causes this? I assume it ...
- 161
0
votes
4
answers
4k
views
Breathing Air Underwater From A Car Tyre
I've seen in many movies and programs the event where a car plummets off the road and in to a body of water, sinking rapidly. The car slowly fills with water as it sinks and the occupant(s) don't ...
- 125
23
votes
4
answers
6k
views
Why do bubbles make a sound?
I have an understanding of how bubbles work. They encapsulate air (or other fluids) in a membrane caused by surface tension.
When they pop, there is often a sound. Sound is a type of energy, kinetic ...
- 459
28
votes
6
answers
56k
views
Why does my door shut faster when the window is open?
I've noticed that if I shut my door when the window is open in a room, the door will tend to shut faster. If I shut the door when the window is closed with a normal force it will not fully close as if ...
- 431
6
votes
3
answers
3k
views
A book sits on a table. What is the net force of air pressure?
An elementary problem asks,
A book is at rest on a table top. In what direction is the net force
of air pressure on the book?
Is this a meaningful question, and if so, what's the answer?
If we ...
- 53.2k