40
votes
Accepted
Why does the pet's water bowl overflow?
A guess. Perhaps there are multiple modes present. It takes a while for them to have an interference maximum at the edge of the bowl.
- 41.1k
18
votes
Why does the pet's water bowl overflow?
If the mat is thick and soft enough to be compliant, then it will couple with the moving mass of the dish and water and allow the dish to tip back and forth, causing the spillage.
This can be directly ...
- 95.5k
12
votes
Why does the pet's water bowl overflow?
The two horizontal sloshing modes could have slightly different frequencies (e.g. if the rotational symmetry is not perfect).
If you then start with the combination of both, but out of phase, which is ...
- 4,912
12
votes
How exactly does a seashell make the humming sound?
While inside your house, place a shell or a cup or a drinking glass or even a cupped hand over your ear and you will observe the same phenomena. Assuming there is no significant wind inside your house ...
- 6,112
12
votes
How does a vehicle's brake affect the friction between the vehicle and ground?
So does braking affects the friction? Does it increase the coefficient
of friction?
Braking doesn't affect the coefficient of friction. But it can cause it to change from the coefficient of static ...
- 73.7k
10
votes
How does a vehicle's brake affect the friction between the vehicle and ground?
Friction coefficient is a function of the material and the condition (wear, wet,...) of wheel surface and ground. So, while braking without slip, friction coefficient is approximately constant. What ...
- 10.7k
8
votes
Accepted
Should I hold a baby formula bottle to cool it down faster?
Sure! I think I'm qualified to answer, not because I used to teach heat transfer in a Chemical Engineering course, but because I raised four daughters!!
Air is an excellent thermal insulator. If you ...
- 305
8
votes
How exactly does a seashell make the humming sound?
Your third option is the closest to the case.
The seashell forms a cavity resonator, which will have some characteristic frequency response determined by things like the shape of the shell etc. ...
- 3,819
5
votes
How exactly does a seashell make the humming sound?
The shell with a small opening forms a Helmholtz resonator that is excited by noise from outside. Image from Formulas of Acoustics, F.P. Mechel pp72. The Wikipedia article has relevant equations for a ...
- 611
5
votes
How does a vehicle's brake affect the friction between the vehicle and ground?
Initially when the vehicle is moving with a constant velocity, there is no relative velocity between the point of contact of tire and the ground. When there is no relative velocity between the tire ...
- 12.5k
4
votes
Accepted
Why do most fish wiggle their tails side to side, and not up-down?
As suggested in the question, symmetry tells us that the caudal (tail) fin of a balanced, neutrally buoyant, underwater animal or vehicle in an isotropic unbounded aquatic environment should work ...
- 11.7k
3
votes
How does a vehicle's brake affect the friction between the vehicle and ground?
It is true that both brake and wheel-ground systems work based on friction. However, these frictions are not the same. Let us look at them separately.
Brake system. In the brake system, friction is ...
- 216
3
votes
How small can a flame get?
The paper by Sunderland et al. (2011) discusses the characteristics and measurements of candle flame shapes, including an analysis of flame height and width for various wick diameters and lengths. It ...
- 305
1
vote
How exactly does a seashell make the humming sound?
The question to the answer is: The seashell does not make noise.
The answer to the question: What is the source of what you hear if you close your one ear with a cup and close the other ear competely ...
- 11
1
vote
How exactly does a seashell make the humming sound?
Neither of the three explanations are true. Actually, the seashell amplifies and reflects the sound of your blood flowing through the blood vessels in your ear! That is what you hear as humming.
- 85
1
vote
How does a vehicle's brake affect the friction between the vehicle and ground?
So does braking affects the friction? Does it increase the
coefficient of friction?
The short answer to the first question is yes. The static friction increases. This is not the same as saying the ...
- 6,112
1
vote
Should I hold a baby formula bottle to cool it down faster?
Liquid cooling is generally more efficient than air cooling for CPUs and car engines, even though a fan is used in the air cooling versions. In the case of the baby bottle we are not comparing the ...
- 6,112
1
vote
Should I hold a baby formula bottle to cool it down faster?
Premise and suggestions
Before answering your question, I'd like to do again the premise that this question and the comments in your question make from little to no sense to me.
Anyway, beside the ...
- 10.7k
Only top scored, non community-wiki answers of a minimum length are eligible