- 4
- 102 270
9spiderlegs
Registrace 17. 09. 2010
JYMS 400 Hall - Metric Conversions Two Ways
The story:
King Henry Died Unexpectedly Drinking Chocolate Milk
k h da u(m, L, g) d c m
All you're doing when converting from one metric unit to another is moving the decimal over. These two methods are easy ways to help you know which direction and how many places to move the decimal.
King Henry Died Unexpectedly Drinking Chocolate Milk
k h da u(m, L, g) d c m
All you're doing when converting from one metric unit to another is moving the decimal over. These two methods are easy ways to help you know which direction and how many places to move the decimal.
zhlédnutí: 107
Video
Submarine Ballast Tanks
zhlédnutí 102KPřed 7 lety
I adapted the video found at czcams.com/video/e7ixYuCObUk/video.html to meet the needs of a lesson I'm planning to teach in a science class. Thanks to Jeff Quitney (czcams.com/channels/M-kjdrQge9AACfB3MSRyrg.html) for posting the original! When I make a complete post about the lesson for my portfolio later on, I'll put a link here.
I Love Apples
zhlédnutí 121Před 9 lety
My apartment mates and I made this video this fall after Kristen purchased a bag of apples that tasted like chemicals. When life gives you disgusting apples, make a video!
3 reasons you should ALWAYS wear a helmet!
zhlédnutí 182Před 11 lety
A public safety project for my English 11 class. Great stuff!
Thank you
Flat earth-
Real submarines not narco imitations that superficially imitate submarines. Ballast tanks are big.
After already having watched multiple recent videos about "How Submarines Work", I've learned about the crew quarters, missiles they have, and what China is working on, but not "how submarines work", namely the ballast tanks. Thankfully, a video from 1955 fit the bill and I could finally get a good idea. I'd still like to learn more about the pressurized air (like if they create oxygen through electrolysis, etc), but I do have to say that this is the best video I've found so far on the matter.
Took the words right out of my mouth. Every other video talks about literally everything other than how a submarine actually dives and resurfaces!
@@ZVEKOfficial 👍
Exactly what I am thinking. Exactly!
@@bobpourri9647 👍
The air tanks to pressurize the ballasts are filled when the sub is surfaced. The compressed air is then stored and ready to use when needed to resurface. I imagine they also have reserve tanks of compressed air that aren't ever used unless the main tank fails in some way.
So compressed air isn't as buoyant as normal air? It's the same amount of air in the sub at all times, it's just compressed into the system when flooding the tanks right? I'm lost
Correct. It’s all about volume and weight. You can have the same quantity (mass/mole) of air but depending on how compressed it is, it will take up a smaller volume. The relationship is - Volume = Pressure/((A Constant) x Temperature) By displacing the volume of water in the tanks with air you reduce the weight which makes the submarine float and vice versa.
Good information. While sinking where the "vent air" is stored? Thanks.
That's what I want to know!
24 MAC 2022 thursday 2:13 PM. Purpose open CZcams to know how Submarine work. Found this channel How are you guy? Still active? More Submarine video 2006
Nice to know I'll use this information on building a Lego submarine
do modern subs have septic tanks too?
where do they get that high pressure air from?
from compressed air tanks in the submarine
omg they made barotrauma into a real thing
Just FYI, the sub at the end is the USS Tusk (SS-426), built during WWII but Commissioned in 1946.
nice
I find these old videos more understandable than most of the videos at present.
True ~
@@djtj6220 yes
Exactly! they finally stated how the water is removed from the tanks. I've been looking for this longer than I'd like to admit...
Fr
I agree with you and the others. I wanted to learn about this subject, and multiple recent videos that I watched before this (all about "how submarines work") were longer yet didn't even touch on how a submarine dives and surfaces...their main capability.
So well explained
you just helped me for y7 homwork
So I guess they need to go up for air periodically to avoid running out of pressurized air needed to surface?
If you imagine the submarine is neutrally bouyant so a small amount of air will expand as the sub rises. As it does the air can be re pressurised back into the system, this only looses a small amount or air. Imagine a tank the size of a firemans cylinder can provide useage for 45 mins at 300 bar, similar story here, as it gets used there is a small drop off in total pressure but years of usages. only after an emergency blow will you need to resurface.
2:36 why the water didnt go in to high pressured air tank?
same as the question: why when you blow out through your nose when you’re under the water
@@fallingup8358 ooh ok, i see. Thx you
@@fallingup8358 is the high pressured air rechage when submarine on surface of the sea?. Bcs when the valve is opened, it decrease air pressure inside the tank, right?
Watching this for help with Barotrauma 😆
This is amazing to me, to watch something I know that many others watched during their training, many of whom are gone now, may they be at peace.
can anyone explain to me how the water enters the ballast tanks in simple and dumb terms? I really don't get how water can just sip through when you still have air inside the tank
@@supermick83 Terrible explanation
When water is entering the ballast tanks air is being drawn out of the ballast tanks. Pumps will pull the air from the ballast tanks and push it away through external holes in the submarine's hull which will leave empty space in the hull, that space will then be filled with seawater through the bottom holes you can see in the video.
good explaination , do you have more videos of this series on submarines?
Glad you found this one helpful! I don't have any more videos like this one, but if you look in the video description I linked the original source of the video (I just added subtitles for a student with an auditory impairment). The original source may have more videos like this one.
I wish people still spoke and presented with a Transatlantic accent like this.
I feel like this is the most american accent in terms of ww2 propaganda i've ever heard , no hard feelings towards USA though , it just doesn't feel modern and right
Ya, it reminds me of the radio guy in fallout.
@jerry calvert America's been shit since the start bud, it was founded by a bunch of alcoholic tax evaders. Now it's grown into a xenophobic prison state run by drug addled, war mongering, kid fuckers. The only foreigners who aren't laughing at your nation are the ones that are too busy pitying everyone born there.
Or some will call it the Mid-Atlantic accent. It's a cross between British and American. I liked it too. I wish we still spoke like this.
Does carrying pressurised air tank effects the buoyancy of the sub? Etc-air is less dense than water, more air mean more floating force?
if the air is pressurized in tanks then it won't be less dense than water anymore. For example the air tanks that a scuba diver uses sink.
@@wqwwqwqqpoppopoo pressurisation is weird man
Thanks for posting this, I still have questions so the search continues. 👍🏼👍🏼
Did you find the answers?
But how would I do a diy ballast tank?
It seems pretty simple you would need some sort of container that when you suck in the water it fills the container and when you push out the water it empties the container so i am thinking some sort of pump but the question would be how you would interface this pump also you would probably have to have some sort of sensors that tell you the desired water level is reach so you don't over suck the water.
@Lxix69 What would you used to control how much water the syringe takes in or lets out. I am also thinking about the size of the sub if you have some sort of mechanism that empties the syringe or fills it
oml
Gay