All Questions
55
questions
0
votes
0
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67
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Underwater chests in video games
Many video games creators put chests with items in various places. Sometimes the chests can be found underwater. Here are two examples:
Dying Light 2
Shadow of the Tomb Raider
However, I started ...
- 291
1
vote
1
answer
372
views
Why doesn't water accumulate at the Equator under the influence of the centrifugal force of the Earth's rotation?
During the rotation of the Earth, a centrifugal force is formed, according to the actions of which ocean water should be collected at the Equator, forming a "hump" hundreds of meters high.
...
- 151
1
vote
1
answer
159
views
Pressure at the bottom of a swimming pool [closed]
Why is atmospheric pressure it not taken into account when finding the force exerted by incompressible fluids onto a surface within the fluid? If you don't understand my question, then consider the ...
- 49
13
votes
9
answers
5k
views
Why does the opposing force differ in when falling on concrete vs on water in spite of Newton's third law?
If a person jumps from the first floor of a building and lands on a concrete surface, they will suffer serious injury because of Newton's third law.
If the same person jumps the same distance and ...
- 165
1
vote
6
answers
997
views
What is physically going on when I stick my finger in a glass of water and the scale tips downards implying it got heavier?
Suppose I have a scale with a glass of water on one side and a counterweight on the other side. If I stick my finger in the glass of water I observe that the water side of the scale becomes heavier ...
- 73
0
votes
1
answer
16
views
Does every Goldilocks planet in various solar systems inevitably have massive amounts of concentrated $\rm H_2O$ meteors?
I’ve always been fascinated with the Anthropic Principle. Our universe seems to have our Chemical, biological, and physical properties/laws designed to favor the existence of life. Although the human ...
- 1
0
votes
1
answer
228
views
How to control the balance of a floating object?
I have this 3D printed object which I hope to float water. I added my printed object to a piece of foam (Glued) and then gently put it on the surface of the water. Every time I put it, it flips over ...
59
votes
4
answers
13k
views
How strong is the force of ice expanding when freezing?
Why does water contract on melting whereas gold, lead, etc. expand on melting? reminded me about something I've been wondering myself for some time.
We know that water expands as it freezes. The force ...
- 3,101
27
votes
5
answers
8k
views
Why do wet plates stick together with a relatively high force?
When I wash up plates and don't dry them right away and place on top of each other, they seem to stick together with a relatively high "force": i.e. when I try to pick the top plate hours ...
- 497
1
vote
2
answers
38
views
Difference in the equlibrium of the buckets [closed]
Let there be a bucket of mass on earth resting on floor with water reaching the brim. And now consider another identical bucket with water till brim in outer space with no gravitational influence, and ...
5
votes
3
answers
236
views
Twice the speed of water carries objects 64 times larger. Why?
From a source1 I regard as reputable, I heard the following assertion (without explanation):
If the water in a stream flows twice as fast, it can carry objects (pebbles/etc) sixty four times larger.
...
0
votes
0
answers
147
views
At what height does water need to fall to produce negative ions?
Research shows that waterfalls and apparently showers produce negative ions, is there a certain height or velocity for water to fall to produce negative ions?
- 17
1
vote
0
answers
127
views
Surface tension in a water drop
Consider the above image
This is a pretty standard diagram but it makes no sense to me. I have some questions regarding it.
Why are we taking surface tension of air-solid interface into consideration ...
- 1,568
1
vote
4
answers
231
views
How do buoyancy and pseudo forces combine?
About the diagram:
A tennis ball is attached to a string which is attached to the jar.
The string is mass less.
The density of the ball is less than that of water.
The F.B.D of the tennis ball:
Thus ...
- 335
1
vote
2
answers
102
views
Physics of an hypothetical animal attack (orca ramming through sea ice)
Question: Could an aquatic animal weighing 5,000 kg and traveling at 55 km/hr break through solid 11cm-thick ice?
Context: I am writing a story and want the physics to be as accurate as possible. I'd ...
- 111