All Questions
5
questions
6
votes
1
answer
1k
views
How does a bottle pour its contents?
Consider this soy sauce bottle:
The cap has two holes that are directly opposite to one another. Covering one hole, I find the soy sauce almost doesn't pour at all.
However, consider a bottle with a ...
- 318
2
votes
1
answer
104
views
Help me understand the physics of masks
Reference: A. Konda et al., "Aerosol Filtration Efficiency of Common Fabrics Used in Respiratory Cloth Masks", ACS Nano 2020, 14, 5, 6339–6347.
The paper linked above was about ...
0
votes
3
answers
242
views
How is the air pushed by the fan? [duplicate]
How is the air pushed by the fan? At first, the fan moved and the air did not move, then the air pressure increased. The air pressure increases and the air starts to move. Is my understanding ...
- 2,040
3
votes
1
answer
2k
views
Why wind stops flowing through a window when the door is closed?
If there is a room filled with air and it had a door and a window, air only blows at a high speed through the window if the door is open. The wind stops if the door is closed. Does the air behave ...
- 141
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