life supporting properties of water
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Life support, or aircrew life support, in aviation, is the field centered on, and related technologies used in, ensuring the safety of aircrew, particularly military aviation. This includes safety equipment capable of helping them survive in the case of a crash, accident, or malfunction. Life support functions and technology are also prominent in the field of human space flight and astronautics.
The life support field includes the personnel and organizations dedicated to providing and maintaining this equipment. Such technologies include parachutes, emergency radios, weapons, and other equipment, as well as the suits worn by aircrew which carry them. Aircrew life support systems personnel are typically responsible for the maintenance of such equipment.
Common abbreviation among aircrew was â€œP.E.â€� short for personal equipment. The common acronym among life supporters is â€œALSâ€� short for aircrew life support.
ALS specialists also conducted survival continuation training including: parachute â€œHanging Harnessâ€� water survival, land survival, aircraft egress and ejection training, escape and evasion and rescue training.
As of Fiscal year 2008, Aircrew Life Support and Survival career fields have combined to become Aircrew Flight Equpment, or AFE for short
Historic Air Force Specialty Code (AFSC) 922X0 122X0 1T1X1
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Answers:1.cohesion forces cause by hydrogen bond between water molecules. help water skaters to float creating a habitat for them. 2.ice floats on liquid water..this helps insulate the surface of large body of water and make life bearable for aquatic life underwater. 3.water is a universal solvent, this help in digestion.
Answers:1) High heat capacity of water: If water increased temperature really easily in response to heat, then all the sea animals would burn and die when the sun came out! 2) High cohesion and adhesion: This is the property of water to stick to other things. Without adhesion, water could not travel up a tree in transpiration, and all land plants would die! 3) Its small size: If water molecules were big, they couldn't diffuse through cells as easily, and they wouldn't be a good medium for transport in the body. 4) Its ability to dissolve stuff: Water can dissolve many things, which allows it to carry minerals and other solids easily. The water molecule is polar which allows it to dissolve other polar things. Many of water's properties are due to hydrogen bonding between water molecules. The hydrogen of one molecule attracts to the oxygen of another. I still think hydrogen peroxide is cooler though (just kidding)!
Answers:1.Water has three states. Below freezing water is a solid (ice or snowflakes), between freezing and boiling water is a liquid, and above its boiling point water is a gas. There are words scientists use to describe water changing from one state to another. Water changing from solid to liquid is said to be melting. When it changes from liquid to gas it is evaporating. Water changing from gas to liquid is called condensation (An example is the 'dew' that forms on the outside of a glass of cold soda). Frost formation is when water changes from gas directly to solid form. When water changes directly from solid to gas the process is called sublimation. 2.Most liquids contract (get smaller) when they get colder. Water is different. Water contracts until it reaches 4 C then it expands until it is solid. Solid water is less dense that liquid water because of this. If water worked like other liquids, then there would be no such thing as an ice berg, the ice in your soft drink would sink to the bottom of the glass, and ponds would freeze from the bottom up! 3.Water is found on Earth in all three forms. This is because Earth is a very special planet with just the right range of temperatures and air pressures. Earth is said to be at the triple point for water. Water is attracted to other water. This is called cohesion. Water can also be attracted to other materials. This is called adhesion. The oxygen end of water has a negative charge and the hydrogen end has a positive charge. The hydrogens of one water molecule are attracted to the oxygen from other water molecules. This attractive force is what gives water its cohesive and adhesive properties. 4.Surface tension is the name we give to the cohesion of water molecules at the surface of a body of water. Try this at home: place a drop of water onto a piece of wax paper. Look closely at the drop. What shape is it? Why do you think it is this shape? What is happening? Water is not attracted to wax paper (there is no adhesion between the drop and the wax paper). Each molecule in the water drop is attracted to the other water molecules in the drop. This causes the water to pull itself into a shape with the smallest amount of surface area, a bead (sphere). All the water molecules on the surface of the bead are 'holding' each other together or creating surface tension. Surface tension allows water striders to 'skate' across the top of a pond. You can experiment with surface tension. Try floating a pin or a paperclip on the top if a glass of water. A metal pin or paper clip is heavier than water, but because of the surface tension the water is able to hold up the metal. Surface tension is not the force that keeps boats floating. If you want to know why a boat floats look here: Why do boats float? 5.Surface tension is related to the cohesive properties of water. Capillary action however, is related to the adhesive properties of water. You can see capillary action 'in action' by placing a straw into a glass of water. The water 'climbs' up the straw. What is happening is that the water molecules are attracted to the straw molecules. When one water molecule moves closer to a the straw molecules the other water molecules (which are cohesively attracted to that water molecule) also move up into the straw. Capillary action is limited by gravity and the size of the straw. The thinner the straw or tube the higher up capillary action will pull the water Plants take advantage of capillary action to pull water from the into themselves. From the roots water is drawn through the plant by another force, transpiration. Click here for more information about transpiration.
Answers:1. Water is liquid, so it carries materials around in the body. 2. Water is polar, so it dissolves many kinds of molecules, has surface tension, cohesion, etc. 3. Water resists temperature change, so it gives a more constant environment for aquatic organisms. 4. Water expands when it freezes, so it breaks rocks into soil, it forms on the tops of bodies of water leaving a habitat underneath, ...