Mengejutkan. Ilmuwan Dunia Sebutkan Gedung WTC 11/9/2001 Tidak Bakal Hancur Hanya Dengan Ditabrak Pesawat. Jadi...
Majalah sains Europhysics Newsvolume 47/4 Tahun 2016 memuat hasil riset bertajuk “15 Tahun Kemudian: Kajian Fisika di Balik Runtuhnya Bangunan Tinggi”. Riset ini berusaha menemukan penjelasan ilmiah di balik kejadian 9/11 atau runtuhnya Menara Kembar World Trade Center (WTC) pada 11 September 2001 silam.
Penulis riset ini adalah Steven Jones (profesor fisika Brigham Young University), Robert Korol (profesor teknik sipil McMaster University), Anthony Szamboti (insinyur konstruksi mesin pada industri penerbangan), dan Ted Walter (arsitek dan insinyur 9/11 Truth).
Sebagaimana diketahui, pada pagi 11 September 2001, Menara Kembar WTC runtuh. Sore di hari yang sama, Gedung 7 WTC, terdiri atas 47 lantai, juga rata dengan tanah meskipun tidak ikut ditabrak pesawat terbang. Ketiga bangunan tinggi itu berkerangka baja.
Riset para fisikawan tersebut merupakan bentuk ketidakpuasan atas hasil investigasi Institut Standar dan Teknologi Nasional (NIST) Amerika Serikat (AS) pada 2008 lalu. NIST sebelumnya memaparkan, kejadian 9/11 cenderung disebabkan oleh kebakaran. Kobaran api meludeskan ketiga bangunan WTC, termasuk kerangka baja yang menopangnya.
Keraguan pun mencuat di kalangan ilmuwan. Sebab, bila simpulan NIST itu sahih, maka kejadian 9/11 adalah satu-satunya peristiwa di mana amukan api bisa meluluhlantakkan bangunan tinggi berkerangka baja. Padahal, lanjut para ilmuwan itu, menara berkerangka baja selogisnya hanya bisa runtuh dalam sekejap dengan cara pembongkaran sengaja (controlled demolition), antara lain menggunakan sejumlah bahan peledak.
Mereka bertolak dari fakta ilmiah bahwa kerangka baja cukup kebal terhadap api. Sebab, gedung 7 WTC memiliki tingkat keselamatan rata-rata sebesar tiga poin. Artinya, butuh sedikitnya 67 persen kekuatan yang hilang dari struktur agar keruntuhan mungkin terjadi. Bangunan mungkin luluh lantak hanya bila struktur baja dipanaskan hingga 660 derajat celsius.
Desain bangunan pencakar langit dibuat sedemikian rupa, sehingga guncangan di satu titik tak akan membuatnya runtuh seluruhnya. “Sepanjang sejarah, ketiga menara berkerangka baja itu pernah mengalami rusak sebagian lantaran kebakaran. Namun, tak satu pun yang runtuh seluruhnya. Malahan, banyak bangunan pencakar langit lainnya yang pernah kebakaran hebat tanpa runtuh total atau kehancuran yang berarti,” demikian kutipan hasil riset tersebut di halaman 22, Europhysics News volume 47/4 2016.
“Setelah ditabrak pesawat terbang saat kejadian 9/11, beban yang ada di bangunan (WTC) hanyalah gravitasi dan kobaran api. Tak ada angin kencang hari itu. Maka para insinyur bingung dan terkejut, kenapa Menara Kembar bisa runtuh total,” lanjutnya di halaman 23.
Pada 1993 silam, Menara Kembar WTC pernah diguncang bom. Setelahnya, pencakar langit itu masih berdiri kukuh. Pertanyaannya: bagaimana mungkin tabrakan dengan pesawat jet membuatnya hancur lebur?
Riset ini lantas mengutip sebuah wawancara Seattle Times dengan pakar konstruksi bangunan, John Skilling. Ia menegaskan, kebocoran tangki bahan bakar pesawat memang bisa memicu kebakaran hebat di sekujur WTC. Namun, kebakaran tak akan mampu meruntuhkannya. “Struktur bangunan (WTC) akan tetap berdiri,” kata John Skilling.
Apalagi diketahui, WTC dirancang mampu bertahan terhadap tabrakan dengan pesawat jet. Dengan kata lain, Skilling percaya bahwa satu-satunya cara meludeskan gedung WTC adalah dengan pembongkaran sengaja (controlled demolition).
Investigasi NIST pun dipertanyakan. Sebab, lembaga tersebut tidak sampai menyelidiki sisa-sisa logam meleleh yang ditemukan di puing WTC. Padahal, dokumen video menunjukkan, ada percikan api berwarna oranye yang muncrat dari bangunan WTC selama tujuh menit, sebelum akhirnya runtuh.
Alih-alih, NIST berkesimpulan bahwa percikan api itu berasal dari alumunium badan pesawat yang menabrak Menara Kembar. Alumunium itu, menurut NIST, bercampur dengan material organik. Namun, pelbagai percobaan membuktikan sebaliknya. Bila simpulan NIST itu sahih, percikan api seharusnya berwarna perak, bukan oranye.
Para peneliti menegaskan, warna oranye itu diduga kuat berasal dari baja panas yang meleleh akibat bereaksi dengan thermite. Bahkan, di bekas reruntuhan WTC ditemukan sejumlah material yang terpaparthermite berukuran nano yang belum sempat bereaksi.
Dalam mekanisme penghancuran bangunan pencakar langit, thermitemerupakan bahan peledak yang biasa dipakai. Sebagai perbandingan, pada 1935, Menara Sky Ride setinggi 191 meter di Chicago, AS, diruntuhkan dengan menggunakan 680 kilogramthermite dan 58 kilogram dinamit.
“Bukti menunjukkan kesimpulan bahwa ketiga bangunan itu (WTC) luluh lantak karena pembongkaran sengaja (controlled demolition).Lantaran itu, otoritas terkait berkewajiban secara moral untuk membuat investigasi yang benar-benar ilmiah dan tak berpihak,” demikian kesimpulan laporan riset setebal lima halaman itu.[rol]
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10 Easy Steps to Succeed in Your Online Classes
Congratulations Youve made up our minds to pursue your upper schooling, and doing so online is how to pass if you have an interest in a versatile, studentcentered educating manner. Studying online permits you to pursue different pursuits and attend to different responsibilities whilst nonetheless operating your method towards some extent. However, it will now and again imply that its clean to get distracted. Here are 10 clean steps to verify luck on your online categories.
- Connect together with your instructors once conceivable. Even in case you are doing smartly within the category, its extraordinarily vital to increase a rapport together with your trainer. When you do that early on, you temporarily understand what the priorities are within the route, what expectancies the professor has of you and youre going to be motivated to prevail, surer of whats forward and higher ready to do smartly with the impending subject material.
Valuable questions to invite your trainer come with the next
How versatile are you with time limits How versatile are you with grownup freshmen What applied sciences do you employ within the route How to be had are you through e mail and different sorts of verbal exchange How do you put up an internet neighborhood and what are the expectancies for participation in it In addition, since instructors are to be had to lend a hand all over the classes, its all the time just right to have had private touch with the trainer early on. This method, when you wish to have lend a hand, its more straightforward to achieve out and get the help you wish to have.
- Confirm the technical necessities of the route. Online categories can also be very advisable for college kids with busy schedules, however provided that they are able to simply get right of entry to the fabrics. It is vital to obviously perceive what the technical necessities are. So, ahead of the route begins or as quickly thereafter as conceivable, youll want to test that your pc will paintings with the entire online equipment, and that you understand how to navigate them. This will be sure that you dont must spend time all the way through the route attempting to determine the generation.
three. Create a time table and stick with it. Quality online instructors create classes which might be clean to navigate and feature transparent expectancies. Having that roughly easytodealwith framework in position will make learning and succeeding that a lot more straightforward. However, although the framework and necessities of your category arent as transparent, youll create a time table and construction, which is able to very much fortify your probabilities of luck within the route. Using equipment equivalent to Google Calendar is a good way to start out. Knowing how your weeks and months glance and scheduling blocks of analysis time for each and every activity or module will will let you stick with a time table.
four. Ask questionsall the time. When you dont perceive, ask questions. When you do perceive, ask additional questions. Instructors recognize scholars who take part, and if theres a participation or dialogue part a part of the grade, then asking high quality questions is helping guarantee your grade on this space. Even if there isnt a participation part, its all the time helpful to invite inquiries to remember to perceive the fabric and are transparent on what is needed of you.
five. Be arrangedand keep arranged. Students whore taking conventional, campusbased classes most often have a constant time table to observe each and every week, through which study room instruction is adopted through assignments out of doors the category. However, for online classes, scholars will have to search out their very own techniques to stick on most sensible in their paintings. It is crucial that you just be arranged from the start of the semester with the intention to achieve success in an internet route. For instance mark task due dates on your calendar, discover a submitting machine for each online subject material and bodily subject material that is helping you stay monitor of the whole lot simply, and shed light on find out about schedules that duvet sections of the route one by one so youve got an arranged tactic to protecting the semesters subject material as you pass alongside.
- Have a blank, quiet, and constant workspace. One factor online and inclass classes have in not unusual is that scholars all the time want a spot to review or whole assignments this is blank, quiet, and constant. You can select the place that is for youwhether or not its at a espresso store, a college library, a devoted place of business, or at house. Wherever you select to review and whole assignments, you must make it a constant location that doesnt have out of doors distractions. It is basically key that where is quiet and lets you focal point in your paintings with out distractions.
- Do no longer procrastinate. Successful distance freshmen hardly procrastinate. They dont do away with assignments or wait till the final second to write down their papers. Successful online scholars experience freedoms that come with operating at their very own tempo and the facility to finish their paintings in as a lot time because it takes them. On the opposite hand, they know that finishing their assignments is best performed early and on time cramming merely doesnt paintings, and it doesnt will let you retain knowledge longterm. Get began early on getting a success.
eight. Work in your studying comprehension. Successful distance freshmen generally tend to have just right studying comprehension abilities. Most conventional, campusbased scholars concentrate to lectures and take notes, and a few online classes additionally require this. However, the vast majority of distance freshmen are anticipated to grasp subject material thru a large amount of studying. Although far finding out classes be offering video recordings and audio clips, maximum systems require scholars to hide and grasp a considerable amount of written knowledge. If it is a problem for you, it could be very useful to first sign up in a studying comprehension route there are lots of assets online that will help you do that. This ability by myself could make a huge distinction on your luck.
nine. Establish and admire routines that be just right for you. If, for instance, youre employed best within the morning or in brief bursts, then set find out about routines that can help you find out about within the prelunch hours when your mind is contemporary. If, then again, you do best through learning at evening or at the weekends when youll devote nightowl hours or longer blocks in your learning, then make it some degree to take action. Consider how and whilst you paintings best, and enforce a find out about plan that respects the routines that be just right for you.
- Connect together with your friends. Establishing sturdy connections with friends and professors is a very powerful facet of tutorial luck, in addition to skilled development. One of essentially the most rewarding reports in schooling is finding out thru collaboration. Forming significant relationships together with your friends and professors can can help you be told extra, keep motivated, and feature an outlet to specific your personal working out of subject material. So, keep attached thru message forums, chat rooms, e mail, and different digital assets. And take note lots of the other people you meet in faculty shall be conceivable process assets down the road so determine connections and keep in contact
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