Seeing Air Trapped Under Ice While Underwater [closed]

Only in very specific circumstances (which your setup seems to negate).Ordinarily (been there, done almost that), you wo not see any specific difference from below.Except in this one case, that I can vouch for: if you release bubbles, and you are under the ice with a reasonable light source with you, you will see your bubbles "falling upwards" on the lower surface of the ice. If they hit a larger bubble of air trapped underneath, delimiting a larger area of the lower surface, the bubbles will merge with it and the whole area will start rippling and sending back the light in a fractured way. That is sure to catch your eye, but if your future scuba does not release bubbles, or the swimmer is not looking exactly upwards, they wo not notice anything.If you are close enough to the trapped air sac that you look at it at a low enough angle (below the critical angle), then Snell's Law comes into play and the air will appear as a mirror. That effect is unmistakable. But you need to view the bubble under the appropriate angle, which means being close to its surface (or looking at a distant trapped sac):

Seeing Air Trapped Under Ice While Underwater [closed] 1

1. What are the reasons for the cooling of air intake on a large diesel engine or any engine?

Cold air intakes are actually a smart way of "naturally-aspirated supercharging" your engine (which does not fit logically) for a little physical phenomenon:Cold air is actually dense air, that's why in air balloons, they heat the air into the balloon, because that makes that hot rises atop of the cold air, thus the balloon rises in the sky, which brings us to a conclusion: Cold air is heavier than hot airMore weight = more density, thus Cold air is denser than hot airDense air is actually more hot air for the same size, and that's what a supercharger or a turbocharger does: compresses air so you can fit more air in less spaceWe all know combustion needs air in first place (Air, fuel (burning solid/liquid/gas), and heat or spark)So if you put more air in the engine, you burn more fuel efficiently, thus you bring more power using less displacement and less fuel

2. Is it true that it's better for your car to always keep the gas tank at least half full?

Is it true that it's better for your car to always keep the gas tank at least half full?NOThat is just extra weight on the cars suspension and tires.That extra weight does not cool the fuel pump. The pump is cooled by the fuel going thru it not around it. If you park in an area where you get a lot of condensation inside your fuel tank you want to regularly change the gas/alcohol mixture in the tank to remove the h2o condensation. This is best accomplished by running the tank down to less than a 1/4 tank and refilling it to replace as much fuel/alcohol as possible.A lot of people who have zero understanding of fuel,fuel tanks, and fuel pumps are spreading misinformation on fuel, how a fuel pump works, and what is 'floating' around in your gas tank. Unfortunately their anecdotal ideas and stories are passed off as fact.Your car built after 1980 has about a 1% chance of NOT having a plastic fuel tank. Plastic does not rust. All gas stations in the western world have fuel filters and water blockers on the pump. So you do not get water or rust pumped into your car. If gas stations did pump water into your car then your car would not be able to drive off the gas station lot. If gas stations were 'watering down' your fuel they would need a seperate water tank and pump Then have to disassemble the fuel dispenser pump hire a criminal to highly modify it and reassemble it so it looked normal. All the dead cars on their lot lined up trying to leave the station would put them out of business and start a class action lawsuit.HINT water is heavier than fuel and sinks to the lowest point in your fuel tank which is where the fuel pick-up is.Running your car out of fuel is bad because the fuel pump is not being cooled by the fuel flowing thru it. The injectors are full of air, the injection pump is full of air. You have to crank the engine over until you have bleed the air out of the system which is hard on starters and all those little things that are cooled and lubricated by fuel.Is it true that it's better for your car to always keep the gas tank at least half full?.

Seeing Air Trapped Under Ice While Underwater [closed] 2

3. Why do people drown when their lungs are filled with air but float when the lungs are filled with water?

Why do people drown when their lungs are filled with air but float when the lungs are filled with water?I think what the question is asking is, why is it that people that have drowned float as opposed to sinking because their lungs are full of water.Obviously you can't drown when your lungs are "filled with water." And so, people that have drowned usually (but not always) initially sink. But as the body starts to decay, gases build up in the body and just like with flotation gear, the body surfaces and floats on or near the surface. They are often referred to as "floaters."Why do people drown when their lungs are filled with air but float when the lungs are filled with water?.

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หรูหราMinimalistหนังนิ่มผ้าวิลล่า3ที่นั่งโซฟา
2020ดีไซน์ใหม่หรูหราโมเดิร์นเลานจ์Modular Sectionalห้องนั่งเล่นเฟอร์นิเจอร์ผ้าโซฟาชุดสำหรับบ้าน
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