2 Replies
kishore
(STUDENT(IPCC))
(867 Points)
Replied 15 October 2012
1.Dog will obsearve feeling of the giver.. if u give food happily and with smile then god will cm 2 know tht food hv a good taste
2.The purpose of the Black Box was to help identify the reasons for a plane crash, by recording any clues in the flight crew's conversation. The Black Box was invented in 1953 and in production by 1957. The first ones were painted bright red or orange to make them easier to find after a crash. In 1960, Australia became the first country to make flight recorders mandatory in aircraft.
the body is called fuselage in aviation terms. Most fuselages are made of many type of materials for obvious reasons. In designing an aircraft, every square inch of wing and fuselage, every rib, spar, and even each metal fitting must be considered in relation to the physical characteristics of the metal of which it is made. Every part of the aircraft must be planned to carry the load to be imposed upon it. The determination of such loads is called stress analysis.
The fuselage is the main structure or body of the aircraft. It provides space for cargo, controls, accessories, passengers, and other equipment. In single-engine aircraft, it also houses the powerplant. In multi-engine aircraft the engines may either be in the fuselage, attached to the fuselage, or suspended from the wing structure. They vary principally in size and arrangement of the different compartments.
There are two general types of fuselage construction, the truss type, and the monocoque type. A truss is a rigid framework made up of members such as beams, struts, and bars to resist deformation by applied loads. The truss-framed fuselage is generally covered with fabric.
Truss Type
The truss type fuselage frame is usually constructed of steel tubing welded together in such a manner that all members of the truss can carry both tension and compression loads. In some aircraft, principally the light, single-engine models, truss fuselage frames are constructed of aluminum alloy and may be riveted or bolted into one piece, with cross-bracing achieved by using solid rods or tubes.
Monocoque Type
The monocoque (single shell) fuselage relies largely on the strength of the skin or covering to carry the primary stresses. The design may be divided into three classes: (1) Monocoque, (2) semimonocoque, or (3) reinforced shell. The true monocoque construction) uses formers, frame assemblies, and bulkheads to give shape to the fuselage, but the skin carries the primary stresses. Since no bracing members are present, the skin must be strong enough to keep the fuselage rigid. Thus, the biggest problem involved in monocoque construction is maintaining enough strength while keeping the weight within allowable limits.
Aluminum
Ductility is the property of a metal, which permits it to be permanently drawn, bent, or twisted into various shapes without breaking. This property is essential for metals used in making wire and tubing. Ductile metals are greatly preferred for aircraft use because of their ease of forming and resistance to failure under shock loads. For this reason, aluminum alloys are used for cowl rings, fuselage and wing skin, and formed or extruded parts, such as ribs, spars, and bulkheads. Chrome molybdenum steel is also easily formed into desired shapes. Ductility is similar to malleability.
Titanium
The use of titanium is widespread. It is used in many commercial enterprises and is in constant demand for such items as pumps, screens, and other tools and fixtures where corrosion attack is prevalent. In aircraft construction and repair, titanium is used for fuselage skins, engine shrouds, firewalls, longerons, frames, fittings, air ducts, and fasteners.
Magnesium
Among the aircraft parts that have been made from magnesium with a substantial savings in weight are nosewheel doors, flap cover skin, aileron cover skin, oil tanks, floorings, fuselage parts, wingtips, engine nacelles, instrument panels, radio masts, hydraulic fluid tanks, oxygen bottle cases, ducts, and seats.
these r must If a flight will fly in the air so it is not possible to do with black box
3.The copyright symbol was introduced in the United States Copyright Act of 1909, section 18.[3]
The copyright notice required by the U.S. Copyright Acts used to be a prescribed, lengthy formula: "Entered according to act of Congress, in the year , by A. B., in the office of the Librarian of Congress, at Washington." In general, this notice had to appear on the copyrighted work itself, but in the case of a "work of the fine arts", such as a painting, it could instead be inscribed "on the face of the substance on which [the work of art] shall be mounted".[4] The Copyright Act was amended in 1874 to allow a much shortened notice: "Copyright, 18 , by A. B."[5]
The Copyright Act of 1909 was meant to be a complete rewrite and overhaul of existing copyright law. As originally proposed in the draft of the bill, copyright protection required putting the word "copyright" or a sanctioned abbreviation on the work of art itself, also for paintings, the argument being that the frame was detachable. In conference sessions among copyright stakeholders on the proposed bill, conducted in 1905 and 1906, representatives of artist organizations objected to this requirement, wishing to put no more on the work itself than the artist's name. As a compromise, the possibility was created to add a relatively unintrusive mark, the capital letter C within a circle, to appear on the work itself next to the artist's name, indicating the existence of a more elaborate copyright notice elsewhere that was still to be allowed to be placed on the mounting.[6] Indeed, the version of the bill that was submitted to Congress in 1906, compiled by the Copyright Commission under the direction of the Librarian of Congress, Herbert Putnam, contained a provision that a special copyright symbol, the letter C inclosed within a circle, could be used instead of the word "copyright" or the abbreviation "copr.", but only for a limited category of copyrightable works, including works of art but not ordinary books or periodicals.[7] The formulation of the 1906 Act was left unchanged when it was incorporated in 1946 as title 17 of the United States Code; when that title was amended in 1954, the symbol © was allowed as an alternative to "Copyright" or "Copr." in all copyright notices.[8]
Prior symbols indicating a work's copyright status are seen in Scottish almanacs of the 1670s; books included a printed copy of the local coat-of-arms to indicate their authenticity.[9]
In countries party to the Berne Convention for the Protection of Literary and Artistic Works, including the modern-day U.S., a copyright notice is not required to be displayed in order for copyright to be established; rather, the creation of the work automatically establishes copyright.[10]
4.It depends how deep you go. Eventually, the pressure would be too much for any tears to exit your tear ducts. That's assuming you could even go that far down without a mask though--I couldn't immagine the pain..
...but normally, I would assume it's easy to cry underwater. All that's different is that you can't see the tears.
5.A working dog is a canine working animal, i.e., a type of dog that is not merely a pet but learns and performs tasks to assist and/or entertain its human companions, or a breed of such origin. In Australia and New Zealand a working dog is one which has been trained to work livestock, irrespective of its breeding.
Within this general descripttion, however, there are several ways in which the phrase is used.
- To identify any dog that performs actions on a regular basis to assist people. In this context, a dog that helps a rancher manage cattle or that performs stunts for a trainer who receives pay for its acts is a working dog, as is a service dog or an assistance dog. This might be in comparison to a companion dog, whose purpose is primarily as a pet.
- To distinguish between dogs that are bred for appearance primarily to win conformation shows and working dogs that are bred primarily for their ability to perform a task. For example, a Border Collie that is a conformation champion is not necessarily a good sheepdog and a Border Collie that is a champion at sheepdog trials might not succeed in show rings for its nonstandard appearance. It is also possible that a specimen may excel in both appearance and performance. In many FCI countries it is impossible for some working breeds' dogs to become conformation champions without having passed adequate breed specific tests measuring their working abilities.[citation needed]
- For some breeds, there are separate registries for tracking the ancestry of working and show dogs. For example, in Australia, there are separate registries for working and show Australian Kelpies; the working registry encourages the breeding of any Kelpies with a strong instinct to herd, no matter their appearance or coat color; the show registry encourages breeding only among Kelpies whose ancestors were registered as show dogs and who have only solid-colored coats. Other breeds have just a working dog register, independent of the showing registers; such a breed is the Boerboel — the breeders of this dog consider entry into the AKC for example would damage the dog's genetic working base if it were ever to be bred for the showing.
- As a catch-all for dog breeds whose original purpose was to perform tasks that do not fit into a more specific category of work. For example, until 1983 herding dogs were part of the Working Group. The Herding Group was created when the Working Group became too large.[1] Today, the American Kennel Club uses Working Dogs to describe breeds who were originally bred for jobs other than herding or hunting. Such jobs might include pulling carts, guarding and so on. However in practice these 'show' dogs under the AKC are not proper working dogs, and would indeed not be suitable for use as such. Many true working breeds are still very valuable as working dogs, and without them local economies would suffer. An example of such a breed is the Anatolian shepherd without which many sheep would be destroyed for example by wolves, feral domestic dogs, and in Namibia, the cheetah.
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6Years ago many people used a 10-key calculator by touch, just the way you can use a typewriter by the 'touch system'. I'd guess people still do this, but 10-key adding machines are not nearly as common now as they were then.
When the phone company came out with their push-button dial, they didn't want these people keying too quickly, so they made the dial upside down so people would have to look at it and find the numbers. It was still much faster than a rotary dial so people didn't mind.
I dnt hv patirence to give nex 13 answers bt I ll answer bt instalment ok.... in the next 2 installments study these ansers and repl me
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