A diver must rise to the surface of the water slowly because of the changing pressures and if they simply rose straight to the top from deep down their brain and body wouldn't be able to cope with trying to equalise the pressure and they would either die or end up with severe problems. It is a way of trying to get your body to equalise the pressure and realise the pressure is lessening. When you go under water, you are putting the amount of pressure of water and the pressure from the land on top of you, that is a lot of pressure to get your body used to. One of the issues was the Benz; which would have them driven mad by the suddenness of the changing pressures.
Things like pressure and temperature can harm deep sea divers.
The pressure is GREATLY increased while going deeper under water.
The temperature is also a lot colder so the suit regulates temperature.
An Oxygen tank is also used... obviously this is the breath.
Because the wet suits keep their body from succumbing to freezing temperatures of the deep ocean.
At high pressures Helium is still non-toxic to our bodies and the molecules are small enough at one atmosphere of pressure (14.7 psi) to not get trapped within our bodies the way Nitrogen does. When in very deep water whatever we breathe gets compressed tightly and is pushed through our lungs' walls into our bloodstream. At one atmosphere of pressure the Nitrogen in the air we breathe is too large to pass into our bloodstream and so is harmless. Every gas other than Helium is toxic at high pressure. While deep diving even Oxygen is toxic in normal percentages.
Improved Answer
The above is not correct. ALL gasses can contribute to decompression sickness (even oxygen in high enough doses - which does not happen in recreational or technical diving). Nitrogen does go into (and out of) the bloodstream even at one atmosphere. Because helium is a smaller gas, it will move into the divers tissues faster than nitrogen and cause a gas buildup faster than nitrogen - which can put a diver into a required decompression stop situation faster than air.
But the original question is why is helium and oxygen used as a breathing mixture. Oxygen is obviously used since it is needed to "fuel" our bodies. It is added since the oxygen content of a breathing mixture would not have enough oxygen in it after helium is added since the helium would dilute the oxygen to an undesirable level. Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
We need to look at a couple of things to understand this question and its answer, so let's dive in. When divers go deep, they breathe air that is under pressure. The deeper a diver goes, the higher the pressure of the air he is breathing. With water pressure all around him, high pressure air is needed to keep his lungs from collapsing.
This air, particularly the nitrogen in it, becomes dissolved in the blood. If a diver suddenly came up from a deep dive, the rapid reduction in pressure would result in the gas in his blood coming out of solution and forming bubbles in his circulatory system. This can be extremely painful and even fatal.
Divers know "the bends" as this rapid decompression a diver experiences when he surfaces too rapidly. It's like taking the cap off a bottle of carbonated beverage. Rapid decompression allows carbon dioxide in the soda to come out of solution and form bubbles. This can happen when to divers who ignore warnings or miscalculate decompression times.
Because they have a air tank to help them breath.
So that there wouldn't be more pressure in the body than outside their body.
Water is generally colder than body temperature so divers need special suits to keep warm to be able to stay down longer.
Following the law of
F=Rho.g.h
The deeper the diver goes the more the force is exerted on them increases. Making it harder to breath.
Normal air you don't need any special air.
first you need wind to go wind surfing. The wind pushes the kite and it moves you where you want to go. It just like a sail boat
It is called infared radiation. Hope that's the answer you need =)
Electrolytes are special types of salt that are vital for your body and cells. Sports drinks offer electrolytes when you need them and are not getting them in your diet.
There is no special equation. But to fully specify a velocity, you need to know an object's speed as well as the direction in it moves.
Thermal protection - water at depth can be very cold.
Both astronauts and sea divers wear special sits because they travel into atmospheres that are strange to our bodies. Our bodies were not built to stand extremely deep waters and outer space. The suits protect them as they go about their business in those places.
You you either need a bathysphere or "scuba" equipment.
First you need to go through the abandoned ship and get a scanner from a scientist in there Note: need dive, then give the scanner to captain stern and he will allow you to choose either a deepsea scale or deepsea tooth obviously you want the tooth. Finally have a clamperl hold the deepsea tooth then trade it to a friend then take it back and it will be huntail, if you chose the scale you will get gorebyss instead of huntail.
containers, space suits,
Because fish have gills,giving them the ability to breath under water and divers dont.
Free divers do but scuba divers do not need to. Scuba divers take their air with them and would have no need to hyperventilate.
You get it from Captain Stern in Slateport City after finding the Scanner in the Abandoned Ship but you need a Pokemon with Dive.
We need air to breath. Otherwise we would suffocate and die. That is why scuba divers have special equipment to allow them to have air to breath underwater.
If the space station is pressurized, I don't think astronauts need to where space suits.
they need protection from stuff
What they wear depends on what events they are competing in. Most athletes wear modern athletic attire that can include warm up suits, shorts and tanks.