With the chemical symbol of "Au", atomic number of "79", and a melting point of 1064.43 degrees centigrade, Gold is a non-toxic, biologically friendly, and a metal of excellent electric conductivity known to Man from ancient times. Also thought to being closely connected to the ancient gods and Angels, Gold was platted into beautiful ornaments, and jewellery to please the wealthy, noble, and rulers. The ancient Egyptians used gold in the making of the Pyramids, and buried the Pharaohs with Gold. Many medieval Kings had their thrones, and armour built form the precious metal. As Man continued to evolve, he found out more ways to use gold to his advantage.
As unbelievable as it seems, gold is also utilised in Aerospace engineering. All the space vehicles produced, or launched by NASA has a quantity of gold within them. Because of its capability to conduct well, it is used in circuitry. Certain elements of all space vehicles have gold-coated polyester film on them. This film serves the rationale of reflecting infrared radiation, and preserves the temperature of the space vehicles as required. In the absences of this film, some components will infuse all the heat, immensely raising the temperature of the vehicle.
Devoid of gold, man would not have visited the moon. Gold, in the shape of sheets 0.15mm thick, are brought into play in space programmes, as a radiation safeguard. For the reason that gold is such an efficient reflector, it redirects the blazing heat of the sun.
Gold is essential to safe space travel, so its requirement has visibly grown, as the space industry has. For instance, more than 40.8 kilograms of gold was utilised in the building of the well-known US Columbia space shuttle, largely in brazing alloys, fuel cell manufacture, in addition to coated plastic films along with electrical contacts.
Gold is used in circuits that are built-in into the spacecrafts, as it is an outstanding conductor. In addition, several parts of spacecrafts are en suite with gold-coated polyester film that reflects infrared radiations, and assists with controlling the temperature within the vehicle. Without this, the vehicle would suck up too much heat, making it complicated to manoeuvre. Gold is in addition used as a lubricant among the assorted mechanical parts of the spacecraft. If any other lubricant were to be used, it would not have endured the radiation in space, and would have infused.
Gold is also used in making helmets put on by astronauts. An extremely thin layer of gold is electroplated within the visor, which averts the unsafe solar emission from inflowing, and mirrors it back. In this manner, it cares for the vision of the astronauts.
Gold is noteworthy in space travel. In view of the fact that space travel has amplified over the years, so has the stipulation for gold. It is used in approximately all space vehicles designed by NASA that are worth billions of dollars.
Even though gold is a costly element, its countless virtues make it useful for space vehicles. Had it not been used to buy gold, space voyage might not have been such a triumphant task, as it is in the present day.
I am sure that there is no person that never passed through a walk through metal detector be it on an airport, mall, shopping center, cinema or similar. Detectors are used for safety precautions, and walking into a safe area, after you passed through a metal detector, can be really overwhelming. Saying this in a few simple words - metal detectors make people feel safe!
The feeling of safety can be created while in an airport, college, office building, or any other area where these detectors are being used. People that are using them can control who enters a specific area and what he/she brings inside it.
There are different types and models of security detectors, but the most commonly used are the hand held models and walk through models. With the help of a hand held detector, security personnel can physically detect if some person carries a metallic object. From the other side, walk through metal detectors are much quicker, and they alert the security personnel of dangerous objects such as knives or weapons.
How metal detectors work is quite simple - they use the principles of electromagnetic induction to detect metallic objects. The detection of a dangerous object is notified with a simple beep alarm sound.
In case you need a metal detector, and still don't know which to choose, here are some advantages of the both mentioned models. First of all, the hand held detectors are more affordable and are able to identify the same way as walk though detectors the presence of metallic objects that are considered to be potentially dangerous. From the other side, walk though models are gold detectors more convenient and more efficient. Overall, if you cannot make up your mind, it is advised that you opt for both models as this way you will surely maximize the safety in the area that requires safety measures.
Detectors are able to deter potential would-be criminals because this way they will think twice after they realize they have to pass through a detector to gain entrance to some specific area.
As for the disadvantages of using security detectors, they are mostly of privacy concerns. A lot of people can find it uncomfortable passing through a detector when trying to inspect whether they have some potentially dangerous metallic objects. In some cases it is possible that they ask to be manually searched when the rules of the safety allow such actions.
Also, in this advantageous medical era, we can find a lot of medical reasons why some person might have metal on his/hers body. Sometimes, metal devices can be surgically installed inside the person's body which will cause the alarm to be set off each time that person walks through a metal detector. In many cases it is possible for the security personnel to see on their computers that the metal object that caused the alarm is actually a harmless tool and not a weapon.
As already said, metal detectors create electromagnetic fields. This can cause electrical interference to electronic devices that one person might have in its possession. This includes medical devices such as pacemakers. Some metal-detectors can harm pacemakers because they have a very strong electromagnetic field. In this case, such detectors can be fatal for those people, and it is strongly advised that they avoid passing through them.
In many situations, metal detectors can give a false alarm if people are wearing some kind of jewelry, watch, phone, loose change or similar. This can make some people feel embarrassed and can cause panic for no reason. A false alarm caused by detectors can be inconvenient both for the security personnel and person to whom the alarm turned on.