A related topic, fish "swim bladders", is worth reading about (Wikipedia is a good source) as there are different ways fish use to fill and empty their swim bladders that vary from this man-made imitation. The fish versions are also far more complex.
I remember from watching this show, and as a child I built it many times, the diving man in a milk bottle project. It required a milk bottle filled with water and stoppered with an airtight flexible membrane. I recall using something tougher than a balloon - maybe a piece of old bicycle inner tube. Inside the water-filled milk bottle was an inverted glass tube, roughly half-filled with water, and with enough buoyancy that it floated to the top of the water inside the milk bottle. Pressing the rubber membrane that was sealed at the top of the water-filled milk bottle would sink the inverted tube (the diver). I could build it again now, if I could find a milk bottle with a wide enough opening at the top.
Isaac Peral, yet another inventor. He was the first to use electrical batteries AFAIK. And he improved by a factor of 10 (I believe) the existing batteries at the time, so it was sort of a double invention
If a submarine carries tanks of compressed air internally, I don't understand how decompressing that air into ballast tanks would affect the buoyancy of the submarine. Wouldn't the air give the same buoyancy force regardless of whether it was compressed?
Its about how much volume is displaced! A tank of pressurised air can sink (scuba tank) but the same amount of air in said scuba tank can fill a balloon that will not sink cause it displaces more water than its weight can drag down! Not English myself so sorry if my explanation is worded wrong! I still suggest you to look it up, I'm no scientist:)
Cameron Pearce the compressed air tanks basically displace the water in the buoyancy tanks by releasing air into it, I'm assuming that they can run out of air in these compressed air tanks because of it
Underwater they pump out the water, its replaced by air. How? The air just becomes thinner. (Even without any air, a vacuum would actually be more boyant than air)
They pump the air out of the buoyancy tanks back into the compressed air tank using a compressor. Otherwise the air would just bubble out of the tank and give away the position of the submarine on the surface.
Logic would dictate that the air in the tank would be heavier because there is more of it compressed into the same space, where in the buoyancy tank the air is replacing water. At most it would be neutral.
@@hyperintelligentfish3873 Yes, it does, but air is still less dense than water at the same pressure. Other thing is that as the water is pushed out, the air becomes less dense as it spreads out to fill the space left by then water. There is a lot of physics going on here.
There's air in water, but it's compressed into the water before it can resurface. Really weird stuff. So I think that's why they have water & air together to compress the air into the water.
A related topic, fish "swim bladders", is worth reading about (Wikipedia is a good source) as there are different ways fish use to fill and empty their swim bladders that vary from this man-made imitation. The fish versions are also far more complex.
I remember from watching this show, and as a child I built it many times, the diving man in a milk bottle project. It required a milk bottle filled with water and stoppered with an airtight flexible membrane. I recall using something tougher than a balloon - maybe a piece of old bicycle inner tube. Inside the water-filled milk bottle was an inverted glass tube, roughly half-filled with water, and with enough buoyancy that it floated to the top of the water inside the milk bottle. Pressing the rubber membrane that was sealed at the top of the water-filled milk bottle would sink the inverted tube (the diver). I could build it again now, if I could find a milk bottle with a wide enough opening at the top.
Perfect Show even from 2022
Isaac Peral, yet another inventor. He was the first to use electrical batteries AFAIK. And he improved by a factor of 10 (I believe) the existing batteries at the time, so it was sort of a double invention
If a submarine carries tanks of compressed air internally, I don't understand how decompressing that air into ballast tanks would affect the buoyancy of the submarine. Wouldn't the air give the same buoyancy force regardless of whether it was compressed?
Its about how much volume is displaced!
A tank of pressurised air can sink (scuba tank) but the same amount of air in said scuba tank can fill a balloon that will not sink cause it displaces more water than its weight can drag down!
Not English myself so sorry if my explanation is worded wrong! I still suggest you to look it up, I'm no scientist:)
Yes, this is weird stuff, i think if the air can over come the pressure of the water it will rise.
It'd be great if you explained how the buoyancy tank works even when it has no access to the air above the surface.
Cameron Pearce the compressed air tanks basically displace the water in the buoyancy tanks by releasing air into it, I'm assuming that they can run out of air in these compressed air tanks because of it
Yeah, I myself understand this, although I wish they would in the video.
Underwater they pump out the water, its replaced by air. How? The air just becomes thinner. (Even without any air, a vacuum would actually be more boyant than air)
He explained that they use compressed air. Rather than a tube to the surface the tube goes to a tank of air.
They pump the air out of the buoyancy tanks back into the compressed air tank using a compressor. Otherwise the air would just bubble out of the tank and give away the position of the submarine on the surface.
Damn Deane
So air (oxygen) doesn't become ore buoyant when you compress it?
Logic would dictate that the air in the tank would be heavier because there is more of it compressed into the same space, where in the buoyancy tank the air is replacing water. At most it would be neutral.
HIF
Good point.
@@hyperintelligentfish3873 Yes, it does, but air is still less dense than water at the same pressure. Other thing is that as the water is pushed out, the air becomes less dense as it spreads out to fill the space left by then water. There is a lot of physics going on here.
There's air in water, but it's compressed into the water before it can resurface. Really weird stuff. So I think that's why they have water & air together to compress the air into the water.
Where’s the mo? 😧
Power-Phull
Electric motor?
I've always said knowledge is wasted if only one person uses it . Thank you so much for making these shows
Too cool
I don't understand one thing that how a submerged submarine get air when it is under water?
Compressed air is released
Where is the moustache??
A learning cornucopia 🌱
Airfix have nothing on you guys !!!
The Egg was here.
I can't remember nothing of that when I was inside of my mom...