0
Defense and Aerospace
Defense involves the research, development and service of military material, facilities and equipment. Aerospace is also involved in research, design, manufacture, operation and maintenance of vehicles moving through space and air. Aerospace has a multitude of military, industrial and commercial applications.
201 Questions
Why does stainless steel not attract to magnet?
Some stainless steel is magnetic, and some is will exhibit only an extremely weak response to a magnetic field. It is the austenitic stainless steels that are generally thought of as being nonmagnetic. Let's review a couple of things to get to our answer. The primary metal alloyed into stainless steel, the one that combines with the iron (steel, actually, since there is carbon included with the iron) is chromium. The presence of sufficient chromium in stainless steels allows these metals to resist corrosion. Note that the stainless steels are stain resistant, and not completely stainless. Anyway, the chromium can be thought of as a "glue" in the metal matrix that prevents magnetic domains in iron from aligning themselves with an external magnetic field. If the magnetic domains in stainless steel, that is, the iron in this alloy, was "free to rotate a bit" within the metallic crystal structure, then the steel would be capable of conducting magnetic lines of force or of becoming magnetized. As it is, in many of the austenitic stainless steels, magnetic domains, which do exist, cannot rotate to align themselves to conduct magnetic lines of force. Nor can these alloys be magnetized to any appreciable degree. We also must note that cold working like drawing or swaging can "free" magnetic domains and cause the alloy to then exhibit ferromagnetic properties.
How does a virtual horizon work?
An ADI Ball, Pitch Ladder, or other type of virtual horizon display takes data either from the INS or directly from the aircraft gyros and displays pitch and roll of the aircraft graphically, simulating the horizon. If the symbol is displayed on a HUD or HMD then the horizon line part of the symbol will directly follow the real horizon.
- ADI - Attitude & Direction Indicator
- INS - Inertial Navigation System
- HUD - Head Up Display
- HMD - Helmet Mounted Display
Why Rayleigh correction formula is required for pitot static tube in supersonic flows?
The Rayleigh correction formula is required for pitot-static tubes in supersonic flows because at high speeds and low pressures, the compressibility effects become significant. The formula accounts for these compressibility effects in the measurement of flow parameters such as pressure and velocity, ensuring more accurate readings in supersonic flow conditions. Without the correction, the readings obtained from the pitot-static tube may be inaccurate due to the influence of compressibility.
Is film cooling and regenerative cooling are same?
No, film cooling and regenerative cooling are not the same. Film cooling involves the use of a thin film of coolant to create a protective layer over a surface exposed to high temperatures, while regenerative cooling uses the transfer of heat from the combustion gases to the incoming propellant to cool the engine components.
What are facts about ammonium nitrate?
It was developed by Germans during a war to replace Chilean Nitrates as Fertilizer. A boatload of it blew up in Texas City. Mines now use it to replace dynamite. It is a whole lot less expensive. It is also used as fertilizer. Plants use the Nitrate part immediately. The Ammonia part slowly turns to a form of nitrogen that plants can use. Plants turn nitrogen into protein.
What is the conductivity of ammonium nitrate?
Ammonium nitrate is a poor conductor of electricity in its solid state, as it is an ionic compound that does not dissociate into ions readily. However, in its aqueous solution, it can conduct electricity as it dissociates into ammonium and nitrate ions.
What is meant by moment coefficient about Centre of Gravity?
The moment coefficient about the center of gravity is a measure of an object's tendency to rotate due to an applied force. It is calculated by multiplying the force by the perpendicular distance from the center of gravity. It quantifies the torque or rotational force acting on an object.
Why is it difficult to identify absolutes in organizational behavior?
Organizational Behavior is a pasture of study that scrutinizes the blow that individual, group, and structure with the goal is to advance an organization's efficiency while concerning with what nation accomplish in an association and how their performances influences the organization's presentation. Absolute behavior typically requires supreme conditions. When you are coping with people and poignant issues, require to be bendable and become accustomed to the circumstances.
How do you begin your speech at a formal business meeting?
Beginning a formal business speech is no different than any other speech or presentation.
- With a SINCERE SMILE, the speaker should start by courtesly greeting their audience, "Good morning", "Good afternoon", or "Good evening".
- Next, the speaker should clearly say their name, i.e., "My name is Charles Boyd." Note: If you aren't a celebrity, or world famous, you should still say your name again, even if you are introduced. Saying your name personalizes you, and affords you some time to focus your thoughts on your speech.
- If you are about to begin your speech and you notice and people are still entering the room, or the audience is resettling themselves after a short break, you would do well to not immediately jump directly into your subject matter. A better decision would be to tell the audience how delighted you are to speak to them about an important matter near and dear to your heart, and how you appreciate their attendance for such an important moment. Scan the room while you are speaking and be sure to make eye-to-eye contact with your audience. This action alone will strengthen your confidence and attract your listeners into your message.
- Once you are ready to 'officially' begin (the room has settled), you should launch into your speech with passion and conviction. There are precious few moments when it comes to public speaking. To waste any of those moments is to do a disservice to your speech and the audience's time.
So to wrap up: How does one start a business formal speech? "Good morning, my name is Charles Boyd. I'm appreciative of your attendance today. The subject I wish to talk about is very important to me, and by the end of my talk with you, I believe you'll feel the same."
Where can you get extra magazine for Baikal Viking MP-446 handgun?
You may be able to find extra magazines for the Baikal Viking MP-446 handgun from gun shops, online retailers specializing in firearms accessories, or directly from the manufacturer. Be sure to check for compatibility with your specific handgun model before purchasing.
How should a journalist behave or should be abehavior of a journalist?
A journalist should prioritize accuracy, fairness, and impartiality in their reporting. They should also be ethical, respectful, and transparent in their interactions and work to hold power to account while providing a voice to the marginalized.
Are aopa and flying magazines collectable?
Yes, AOPA and Flying magazines can be collectible items for aviation enthusiasts and collectors. Issues featuring significant events or milestones in aviation history, special editions, or those in mint condition may hold more value. Collectors may be interested in acquiring specific issues or a complete set.
Where did India's first Hindi newspaper first started?
India's first Hindi newspaper, Udant Martand, was first published in 1826 by Jugal Kishore Shukla in Calcutta. It played a significant role in promoting Hindi language and literature during that time.
What do aerospace engineers do?
Aerospace engineers do many things. The design, examine, analyze, and produce many objects like military fighter planes, vehicles, aircraft, spacecraft, missles, and more. There are 2 types of aerospace engineers: the aeronautical and the astronautical engineers.
Do you need a licence to keep a pig?
Not in most places, if you are allowed to have a pig. Many places have ordinances that don't allow you to keep pigs in your residence in a town or city.
- complex carbohydrates (e.g. starches and cellulose)
- proteins
- small kernel at center containing fertilized seed
well first of all diamond can't be made into a plate because of a diamond is on a scale of 10 on the mohs hardness scale. Plus we dont have the weight or heat to cut a diamond UNLESS the machine is diamond tipped. You know the steel they make fire engine bumpers out of? That's diamond plate. To make a long story very short, how you cut diamond plate depends on what it's made from, but it cuts like flat plate does.
How do you calculate cost index?
Cost Index = Cost of Time / Cost of Fuel
Cost of Time or C(t) is the complete cost to operate in one hour: Flight Crew Wages, Maintenance, Leases, etc
Cost of Fuel or C(f) is the cost of fuel per gallon converted to cents; so, times 100.
Example:
>Capt is paid 70/hr, FO is paid 40/hr and FA is paid 25 and then the extras = $150/hr operating cost
>fuel is purchased at 3.50/gal
CI = C(t) / C(f)
= 150 / 350
= .42
what does that mean? As CI approaches 0 the airplane should be flown closer to MRC (Max Range Cruise Speed, a slower speed that enables time aloft) while the closer the value to 1 a faster speed should be flown to obtain LRC (Long-Range Cruise, a speed that is "conducted at the flight condition which provides 99 percent of the absolute maximum specific range. the advantage is that 1 percent of range is traded for 3 to 5 percent higher cruise velocity. Since higher cruise speed has a great number of advantages, the small sacrifice of range is a fair bargain.
Basically CIs are a way to penny pinch on each flight. If a plane can save as little as 200lbs of fuel on one flight, factor that value against the near 1500 daily departures of a large airline and you are saving yourself some serious change
1500 flights x 200lbs of fuel saved x $3.50 per gallon = $1.05M/day in fuel savings!
Why is Microsoft a global leader in the software industry?
Well, that is tricky to answer.
MS managed to get its operation system (OS) Windows on majority of computers. MS developed a new concept of SW sales. To IBM did not sell his OS, he leased it instead. That was in times, when people thought money were in hardware, rather then in software.
Moreover, despite not first, MS managed to develop and more importantly sell mouse style control of the computer, as well as windows drag and drop philosophy of working with SW. In some extend we can say that at its time MS was an Apple of that age. He spotted a niche market and developed a new concept of usability that people liked.
And then, it was just a snowball efect. :-)
What are the uses of the computer in different fields?
Generally speaking, small PC = Personal computer for general user (ie games, doc, etc) Mediun PC = are for small to medium size businesses Super Computers are for the very large companies that require large amounts of data processing Inter networks = state to state or international Intra networks = within a company (ie branches) of tht local area The ways they are used is of multiple levels. computational PCs = atronomy, physics, mathematics analythical = data analysis (labs) communicational = internet, satellites It can be from cooking (ie microwave ovens, fridges, breadmaker, rice cooker, etc) through to your mobile phones to cars, aeroplanes, space devices and so on. The list is long you will need to dig up more info from these expressed bases above.
Is su30 is better than f 22 and f 35?
The Su-30, F-22, and F-35 are designed for different roles and missions, making direct comparisons challenging. The F-22 excels in air superiority with advanced stealth and supercruise capabilities, while the F-35 focuses on multi-role versatility and advanced sensor fusion. The Su-30, known for its agility and combat capabilities, is optimized for air-to-air and air-to-ground missions. Ultimately, their effectiveness depends on the specific operational context and requirements.
