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Nairaland Forum / Ndiri's Profile / Ndiri's Posts
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Pastor Omokri so you are among those Pastors that used to watch earthly bbnaija show ? I remove cap for you. 1 Like |
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Badboibipo:....how was the hot tea and bread? |
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T0T0fucker: Slide seven onions, add seven seeds of alligator pepper, seven pieces of bitter collar, add salt and sugar plus red oil, take it to that spot they usually gather midnight, they will cease from coming there....you come and give testimony. |
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revived2: Serious |
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Philipponzaghi:......name checkers you don't need to search again: is boldly written ....Igbos dey represent well |
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Ok.....500k @ 26, you think that you have arrived? Better hide your face please. |
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Next topic please, when a child finish secondary school at 15years, then the child will now wait till 18.....ok 1 Like |
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Pls is sex determination assured using IVF? Secondly, when one uses her own egg with another donors sperm, other than her husnand's sperm, how sure are you that the secret will be well kept? |
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Congratulations Mr. Jude Onwuzulike, may the good Lord restore your peace.........AMEN |
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Ok. Congratulations, you have finally made it to the front page of Nairaland, from day one you married, you should have known that your husband is your husband and not a stranger, with 70k salary monthly he was able to raise almost 600k for your traditional marriage ands you still task him, haba |
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Money2000:.....you mean that you dated her for 4 years with out showing interest to marry her.... brother repent |
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DaddyRochie1642:........and the third suspect is Abdul Musa |
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Chinkoalhaji34:.....you can only end up disgracing your family and not Igbo race, |
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Salewa97:......keep on disgracing your family, drug traficers are liable to die Young. |
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Youngblogger:.... which state and tribe in Nigeria, name and tribal shakers come and help us |
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Wilfem:.. Sorry fellow Nigerians, but why must you travel at that kind odd hour, if you can not catch up with afternoon train kindly sleep over in Abj. |
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HandmadeD:.....thank God, NASA has finally discovered water in the moon. 1 Like |
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derrick015:......you don't need any prayer in this case.....remove your mind from porn, engage your self in something reasonable, don't tell me that you didn't get the advice well. |
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OVB123:........ serious, so goat can bite? |
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ShoProperties:.......... Create Account | Sign In Feb 15, 2017,10:35am EST The Physics Behind Why Firing A Gun Into The Air Can Kill Someone Ethan SiegelSenior Contributor Starts With A BangContributor Group Science The Universe is out there, waiting for you to discover it. This article is more than 3 years old. Naval soldiers prepare to fire a gun salute during a burial at sea. This would be catastrophically unsafe in any region where the bullets could come down and land on a human. Image credit: U.S. Navy photo by Mass Communication Specialist 3rd Class Kevin J. Steinberg. Naval soldiers prepare to fire a gun salute during[+] Would you fire a gun into the air in celebration if you knew that, when the bullet comes down, it could kill somebody? It’s no surprise that bullets fired towards a target can easily destroy whatever they run into: a bullet from an AK-47 leaves the rifle traveling at over 1,500 miles per hour (670 meters per second): about double the speed of sound. Despite only having a mass of about five grams — under a fifth of an ounce — it’s got the energy of a brick dropped from a 30 story building. Concentrated into a tiny surface area at the bullet tip, it can easily break through your skin. And once it does, that energy and momentum tears through your body, ripping a hole through blood vessels, muscle, and potentially vital organs. No wonder it can kill you. A 0.50 caliber bullet wound of the face. The patient was injured while heating a 0.50 caliber incendiary machine gun bullet with a blowtorch in a World War II-era accident. Image credit: the National Museum of Health and Medicine. A 0.50 caliber bullet wound of the face. The[+] But what if the bullet is fired up, rather than directly at a target? If you performed that experiment on the Moon, if the bullet went up at 1,500 miles per hour, then no matter what angle you fired it at and how long it took to come back to the lunar surface, it would come down at 1,500 miles per hour. A bullet fired away from the Moon’s surface would be just as lethal as one fired across it. But on Earth, we have our atmosphere, which means we also have air resistance. A bullet fired straight up, with no wind, might reach a height of 10,000 feet (about three kilometers), but will come back down at only around 150 miles per hour: just 10% of the speed and with only 1% of the energy as the originally fired bullet. Ultra-high speed photo of bullet fired out of a[+] But in reality, there are extra factors at play: We do have wind, which can make bullets fired even straight up come down up to two miles away. Not every bullet is fired straight up; many are fired at an angle. If the bullet never stops or tumbles, it can maintain much greater speeds: many hundreds of miles per hour. All a bullet needs to do to be potentially lethal is break the skin, which occurs at different speeds for different bullets and different people. So in order to know whether a bullet will break your skin or not, we need to look at two things: the bullet type and your skin type. Various weights, sizes and calibers of bullets. Even at the same muzzle velocity, when fired up, these bullets will all come down at different speeds. Image credit: Bobbfwed at the English language Wikipedia.Various weights, sizes and calibers of bullets. Even at the same muzzle velocity, when fired up, these bullets will all come down at different speeds. Image credit: Bobbfwed at the English language Wikipedia. Various weights, sizes and calibers of bullets.[+] The generally accepted threshold for breaking the skin barrier is 136 miles per hour, although some bullet/skin combinations will cause the bullet to bounce off you at up to 225 miles per hour. The pointier a bullet is, the slower it can be moving and still break your skin. (Hollow point bullets are more dangerous not because it’s easier for them to puncture your skin, but because they create more damage once they do.) Bullets of different sizes and calibers can puncture skin more easily: buckshot will perforate skin at 145 miles per hour and bullets from a .38 caliber revolver will do so at just 130 miles per hour. Bullets from a 9mm handgun may max out at speeds as low as 102 miles per hour. And a .30 caliber bullet, according to Mattoo’s equation, might do so at only 85 miles per hour. Various thicknesses of skin are found on varying locations on the human body, and often correlate with hairy regions. Your armpits have particularly thin skin. Image credit: Wikimedia Commons users Madhero88 and M.Komorniczak.Various thicknesses of skin are found on varying locations on the human body, and often correlate with hairy regions. Your armpits have particularly thin skin. Image credit: Wikimedia Commons users Madhero88 and M.Komorniczak. Various thicknesses of skin are found on varying[+] In addition, skin thickness varies from person-to-person and at different places on your body. The skin on your upper lip is 50% thicker than the skin on your cheek, and the skin just below your cheekbones by your nose is even thinner, particularly in the elderly. Babies and young children have very thin skin relative to adults, and while the elderly have thicker skin in general, it has less elasticity and is easier to tear and puncture. The only way to guarantee a bullet will bounce off of your skin? Be Superman. Image credit: Leo Leung of flickr, via https://www.flickr.com/photos/mleung311/8854935471.The only way to guarantee a bullet will bounce off of your skin? Be Superman. Image credit: Leo Leung of flickr, via https://www.flickr.com/photos/mleung311/8854935471. The only way to guarantee a bullet will bounce off[+] According to Hatcher’s Notebook, where U.S. Army Major General Julian Hatcher reported on a huge suite of military ballistics tests, a .30 caliber bullet has a terminal speed of 200 miles per hour, not 150. When you fire a bullet into the air, it typically takes between 20 and 90 seconds for it to come down, depending on the angle it was fired at, its muzzle velocity and its caliber. New years and July 4th, in the USA, are particularly dangerous in urban areas for this, as injuries from falling bullets and even occasionally deaths result. While reports from hospitals are often disputed by police, there are well-documented cases that prove how lethal this can be. In 2010, Marquel Peters, four years old, was killed by a stray falling bullet in Decatur, GA. As long as a bullet can puncture your skin, the[+] If you must fire a gun into the air, the way to minimize your potential risk to yourself and others is to: fire the bullet as close to vertical as possible (where it will lose the most speed), from a low altitude location (where air resistance is higher), in a rural, low-population-density area (where it’s less likely to hit a person), and to fire a lighter, larger bullet (with a lower terminal velocity). And finally, as a bystander, know that you aren’t completely safe from a hail of falling bullets until two minutes have passed since the final gunshot. Firing a gun into the air might be extremely unlikely to kill the person firing it, but there’s a reason that most major cities have outlawed it: your freedom to celebrate ends when your celebration starts to kill innocent bystanders. Get the best of Forbes to your inbox with the latest insights from experts across the globe. Follow me on Twitter. Check out my website or some of my other work here. Ethan Siegel I am a Ph.D. astrophysicist, author, and science communicator, who professes physics and astronomy at various colleges. I have won numerous awards for science writing…Read More CorrectionsReprints & Permissions Loading ... Also on Forbes Science SHOPPING 20 Home Office Upgrades For A More Attractive Working Space SCIENCE Indirect Contributions Are Essential To Physics © 2020 Forbes Media LLC. All Rights Reserved. AdChoicesPrivacy StatementDo Not Sell My InfoTerms and ConditionsContact UsReport a Security IssueJobs At ForbesReprints & PermissionsForbes Press RoomAdvertise 1 Like |
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Afamed:.....this is social media, take note. |
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Monchadam:....... brother she's gone forever, kindly delete her pictures from your phone, delete her phone number, delete her memories, there are so many good ladies out there. This is my signature.................... good morning |
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ahukannakate:.............. 90k state ministry of health job. |
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Elder0001:...................mind you, Innoson is a self made billionaire. |
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garfield1:.......Jegede may likely win, but try to work for your people please. 2 Likes |
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EVideos:nice one |
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Fox12:Are you staying together with them in the same house? If yes at your age, you should learn how to bridle your mouth. |
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SecretSpy666:My advice to you is to give them long rope, try to forgive, assist them to your own level, but watch your back Well, hopefully you try to marry soon. |
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Are you serious? quote author=Arrewa post=94094298]Dear sex starved nairaland undergraduates! Make una calm down... School na till February ![]() |
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Adultery is very bad, it always lead to something else. |
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post=94039248:Guys learn how to mind your business. |
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Chisomhustler:.Nigeria Republic |
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