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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.
mmesser314's user avatar
  • 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 ...
niels nielsen's user avatar
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 ...
Jos Bergervoet's user avatar
1 vote

Can siphons improve the efficiency of hydroelectric dams?

No, you cannot gain any efficiency. Remember the bernoulli equation: $P_1 + \frac12\rho v_1^2 + \rho gh_1 = P_2 + \frac12\rho v_2^2 + \rho gh_2$ If you have water at rest at $P_{atm}$ on the top, and ...
Pato Galmarini's user avatar
1 vote

Why will low pressure pulling higher pressure air towards it make "thrust"?

Low pressure air means a lack of air molecules. Normal pressure air means a normal amount of air molecules. Low pressure means that the combination of the number of molecules and the speed of the ...
BowlOfRed's user avatar
  • 41k
1 vote

Why there is a delay before canned fruits float to the top?

Just a guess. If berries contain air, the air expands as the berry gets hot. This increases the volume of the berry, but not its weight. The berry floats when the weight of the berry is less than the ...
mmesser314's user avatar
  • 41.1k

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