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Is air pressure higher at higher elevation?
No, air pressure decreases as elevation increases. This is because there is less air above you exerting downward pressure the higher up you go. At higher elevations, there is less atmosphere above to push down on you, resulting in lower air pressure.
Why helium is used for respiration in deep water instead if nitrogen?
To breathe underwater a diver must be supplied air at a pressure equal to that of the water surrounding the diver. However there is an upper limit of oxygen pressure above which the oxygen becomes biochemically toxic. Therefore, it is necessary to include something to dilute the oxygen in a diver's breathing gas. To satisfy normal breathing requirements at high pressures, it is necessary to supply between 0.2 and 1.5 atmospheres of oxygen with the rest of the balance made up by a non-toxic diluent (such as nitrogen). Air of course is a suitable breathing mixture for a diver based primarily on nitrogen as the oxygen diluent.Air is in fact the preferred breathing mixture for all dives to depths of less than about 150-200 fsw (feet of sea water). However, even at 150 fsw, when breathing air most divers feel the effects of nitrogen narcosis. Beyond this depth helium is preferred as the diluent and is in fact particularly well suited to the depth range immediately beyond air diving (e.g., 150-250 fsw). Helium does not cause narcosis at these pressures, is relatively inexpensive and is readily available. Moreover helium has a low density and is, therefore, easy to breathe at such pressures. There are problems with helium though, problems that are seriously amplified as diving depths approach those of the outer continental shelves and beyond. First there is the problem of communication. Everyone knows what breathing helium will do to your voice. Due principally, it is believed, to changes in the speed of sound in the gas medium, this effect is a sensitive function of depth. Helium speech at sea level is distorted, in a way that seems funny to both the listener and the speaker, but it is completely intelligible. At 200 fsw speech with Helium is still reasonably understandable. However, as depths increase to the range between 400 and 600 fsw the situation becomes more serious, and to someone trying to get a job done helium speech is no longer considered funny. Speech in this range is totally lost on an untrained ear, though anticipated statements can be understood by a listener familiar with the voice and the situation. So often, however, a sudden change in the topic of conversation throws everyone off, and it is necessary for the diver to speak slowly, repeat himself and to try to say things a different way. It can be done but it is slow and consequently expensive. The other problem is that Helium is about 4 times as good at conducting heat as nitrogen. Which when at the chilly depth of 500 fsw means that you are going to get VERY cold.
Why does air exert pressure?
Air exerts pressure in the same way that water exerts pressure on a diver. Air has weight, and because we are at the bottom of a blanket of air that surrounds the earth, the weight of that air is pressing down on us (creating pressure). If you go under water, you'll feel the additional pressure created by the weight of the water above you.
When the partial pressure of oxygen exceeds about 1.4atm what happens to the amount of oxygen in a divers bloodstream when he or she breathes oxygen at elevated pressures?
When the partial pressure of oxygen exceeds 1.4 atm, breathing oxygen at elevated pressures can lead to an increased amount of oxygen dissolved in the diver's bloodstream. However, it can also increase the risk of oxygen toxicity, where high levels of oxygen can damage cells and tissues. Monitoring oxygen levels and following safety protocols are crucial to prevent adverse effects.
Why does fresh air will kill you?
Fresh air, by definition, is clean breathable air. It will not kill you under almost all circumstances. These circumstances can be manipulated under specific, and somewhat unusual conditions, to result in your death. As an example, a hard-hat diver or caisson worker receives fresh air from a surface mounted compressor directed into his helmet or working space. As the air is pressurized it allows the nitrogen (almost 80% of the air) to dissolve in your blood. If you are suddenly decompressed by rising up in the water too quickly (for the diver) or leave the caisson without decompression (for the sandhog) the nitrogen will "fizz" in your blood like the bubbles in a bottle of pop when you open it and collect in your blood vessels. This problem is called "the bends" from the way the pain preceding death doubles you over. This will stop the blood flow to your heart or brain or other essential parts and you will be very sick or die.For this reason divers use air mixtures that are artificial, not fresh air. These mixtures are oxygen helium mixtures that do not create the bends,
Does a diver at the top of a diving board have kinetic energy?
Yes, the diver at the top of the diving board has potential energy due to their position above the ground. Once the diver jumps, this potential energy is converted to kinetic energy as they accelerate towards the water.
Is executing a swan dive kinetic or potential energy?
Executing a swan dive involves converting potential energy (stored energy due to the diver's height above the water) into kinetic energy (energy of motion as the diver accelerates downward).
What energy would a diver at the top of a cliff use?
The diver at the top of the cliff would have potential energy due to their position above the ground. This potential energy can be converted into kinetic energy as the diver falls towards the water.
What form of energy does a diver have standing at the top of a tower?
A diver standing at the top of a tower has potential energy due to their position above the ground. This potential energy can be converted into kinetic energy as the diver jumps off the tower.
What type of energy does a diver on top of a platform have?
The diver on top of a platform has potential energy due to their position above the ground or water. This potential energy can be converted into kinetic energy as the diver jumps or falls from the platform into the water.
What is drivers kinetic energy change as the diver falls?
As the diver falls, their kinetic energy increases due to their gain in speed. This increase in kinetic energy correlates with a decrease in potential energy as the diver descends towards the ground. The total energy of the diver (kinetic + potential) remains constant if we ignore air resistance and other external forces.
How does a diver's kinetic energy changes as the diver falls?
As a diver falls, their kinetic energy increases due to the acceleration from gravity. Initially, when the diver jumps off the platform, they have potential energy that converts into kinetic energy as they descend. The faster the diver falls, the greater their kinetic energy becomes, following the formula ( KE = \frac{1}{2}mv^2 ), where ( m ) is mass and ( v ) is velocity. Thus, as the diver falls, kinetic energy rises while potential energy decreases until they reach the water.
What form of energy does a diver on a tower have?
I am pretty sure that it is gravitational potential energy.
A diver who weighs 500 N steps off a diving board that is 10 m above the water The diver hits the water with kinetic energy of?
62,500j
What type of energy does a diver have while standing at the edge of a diving board?
I think itz gravitational potential energy
What energy is it when the diver jumps and the board bends down?
The diver at the top of a diving board has potential energy
What is the diver gravitational potential energy just before the dive?
The diver's gravitational potential energy just before the dive is at its maximum, as the diver is at the highest point in the dive and has the most gravitational potential energy. This potential energy will be converted to kinetic energy as the diver falls during the dive.
