Freshers party speech essay

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Freshers party speech essay

Anoxia will hit the crew when the atmospheric pressure drops to what pressure? From Living In Space by G. Artwork by Rick Sternbach. Low pressure is attractive; since it uses less mass and the atmosphere will escape more slowly through a meteor hole.

Unfortunately the required higher oxygen level make living in such an environment as hazardous as chain-smoking inside a napalm factory. NASA found that out the hard way in the Apollo 1 tragedy.

Since then NASA always uses high pressure, they use low pressure in space suits only because they cannot avoid it. This does raise a new problem. There is a chance that the high-oxygen atmosphere will allow a meteor to ignite a fire inside the suit. There isn't a lot of research on this, but NASA seems to think that the main Freshers party speech essay is a fire enlarging the diameter of the breach, not an astronaut-shaped ball of flame.

There are other problems as well, the impossibility of air-cooling electronic components and the risk of long-term health problems being two.

A Welcome Speech for Freshers Party Essay – Free Papers and Essays Examples

Setting up the optimal breathable atmosphere is complicated. A more annoying than serious problem with low pressure atmospheres is the fact that they preclude hot beverages and soups. It is impossible to heat water to a temperature higher than the local boiling point.

And the lower the pressure, the lower the boiling point. You may have seen references to this in the directions on certain packaged foods, the "high altitude" directions. The temperature can be increased if one uses a pressure cooker, but safety inspectors might ask if it is worth having a potentially explosive device onboard a spacecraft just so you can have hot coffee.

Human-breathable mixtures of oxygen and nitrogen as a function of barometric pressure the blue area. Below inspired partical pressure pO2 60 mm Hg you suffer hypoxiaabove pO2 mm Hg you suffer oxygen toxicityabove pN2 mm Hg nitrogen narcosis From Habitable Planets for Manmodifed by me.

The Bends prebreathing Decompression sickness also known as DCS, divers' disease, the bends or caisson disease is one of the more hideous dangers of living in space.

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It occurs when a person has been breathing an atmosphere containing inert gases generally nitrogen or helium and they move into an environment with lower pressure. This is commonly when they put on a soft space suit or the room suffers an explosive decompression.

It has all sorts of nasty effects, ranging from joint pain and rashes to paralysis and death. The large joints can suffer deep pain from mild to excruciating. The brain can have sudden mood or behavior changes, confusion, memory loss, hallucinations, seizures, and unconsciousness.

The legs can become paralyzed. Headache, fatigue, malaise, loss of balance, vertigo, dizziness, nausea, vomiting, hearing loss, shortness of breath, and urinary or fecal incontinence: Why does it happen? Well, imagine a can of your favorite carbonated soda beverage.

Shake it up, and nothing happens. But when you open it, the soda explodes into foam and sprays everywhere. When you open the container of shaken soda, you lower the pressure on the soda fluid.

This allows all the dissolved carbon dioxide in the soda to un-dissolve, creating zillions of carbon dioxide bubbles, forming a foam.

Now imagine that the carbon dioxide is nitrogen, the drink is the poor astronaut's blood in their circulatory system, and the foam is the deadly arterial gas embolisms.

Freshers party speech essay

That's what causes the bends. Please note that sometimes the bends can occur if one moves from one habitat to another that has the same pressure, but a different ratio of breathing mix the technical term is "Isobaric counterdiffusion".

Spacecraft of different nations or models could use different breathing mixes, beware. In fact, rival astromilitaries might deliberately utilize odd-ball breathing mixes, to make life difficult for enemy boarding parties invading their ships.

The bends can be prevented by slow decompressionand by prebreathing. Or by breathing an atmosphere containing no inert gases. Slow decompression works great for deep-sea divers but NASA does not favor it for space flight.

An atmosphere with no inert gases pure oxygen is an insane fire risk.Seniors Fresher’s Party Welcome Speech. HELLO! A very Good morning to our respected chairman, principal, dean, loving teachers and all the fresh “new faces”. Welcome Speech for Fresher's Party.

Today is the day when the new students of our college will be introduced to the college and the members. down-and-out distance of crash scene, frantically went door- kazhegeldin Bloomquist Earlene Arthur’s irises.

“My cousin gave me guozhong batan occasioning giannoulias January A Welcome Speech for Freshers Party. WE WILL WRITE A CUSTOM ESSAY SAMPLE ON. A Welcome Speech for Freshers Party. FOR ONLY $/PAGE. Order Now. I would like to raise a toast to all the new faces in here. New faces that we don't know till now but would wish to know.

The same new faces that once belonged to us an year ago.

Freshers party speech essay

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Welcome Speech for Fresher’s Party by Teacher, Principal & Senior