What is the most efficient bridge design?

It depends. If it is less than one metre, then the barrel culvert is the best. If it is one to five metres and relatively shallow, then the box culvert is the best. If it is up to 5 m, relati…

Top stories for Long   What is the most efficient bridge design? Susanna Viljanen, knows Finnish • Answered April 19 It depends. If it is less than one metre, then the barrel culvert is the best. If it is one to five metres and relatively shallow, then the box culvert is the best. If it is u... Read more » 1.9K 83   Have you ever encountered a novice guitar player with a ridiculously expensive and rare guitar? What did you think? Jon Wisbey, Guitarist / Vocalist at Alien Stash Tin • Answered April 15 A family friends son, who was 12 at the time wanted to play guitar and I agreed to teach him the basics. I lent him one of my spares to start with, an old things called a Z... Read more » 4.1K 74   Titanium is the cheapest metal that have complete resistant to ambient seawater corrosion, why Titanium-based armors not used for modern tanks although it will cost only tiny fraction of the current MBTs prices? Robert Clouse, Disabled Veteran at Cincinnati, Ohio, USA (2000-present) • Answered April 13 Titanium is extremely difficult and expensive to work with. Compared to steel it is brittle as well. Steel will flex before it will break, but titanium just suddenly breaks ... Read more » 1.4K 82   Newborn babies of animals don't need any vaccines at any point in their life, but human babies have to take so many vaccines to survive and remain healthy. Why is that? Enrique Cerdo., FULLY VAXXED! Not impressed with your excuses. • Answered March 19 I have a fun activity for you for this weekend. For this activity, you will need a young puppy and a car along with some money. "Who's a good boy?" Take said puppy and drive t... Read more » 4.1K 215   What were the biggest challenges in programming games before dedicated graphics cards became common? Chris Nash, Former game programmer, now real-world programmer • Answered March 17 It was messy and hard. Let me start off by saying this is a PC-centric question. Video game consoles never had (and still don't have) interchangeable graphics cards. They ha... Read more » 31   Why are 4 wheels in the middle of a 16-wheeler truck in the air? Asked in Cars and Automobile • Answered by Chris Summers • November 20 They have two purposes. The tires lower when they have a load on that is heavy enough to require them. Each axle on the road has a weight limit and if you travel overloaded... Read more » 386 55   Pope Francis has died. What do you think about this? Jean-Marie Valheur, former Catholic • Answered April 21 When Jorge Mario Bergoglio was 21 years old, the young Argentinian man caught a very bad case of pneumonia. Doctors found three large cysts, and were forced to remove part ... Read more » 827 38   Why do premium smartphones lack removable battery and expandable memory? Franklin Veaux, Technology enthusiast, mad engineer, and tech startup founder. • Answered April 23 The answer you'll get from a lot of folks is "planned obsolescence, they want you to buy new phones." That's nonsense, of course. The thing about people who use electronics ... Read more » 1.5K 184   If the meter was derived from the radius of the Earth being ten thousand kilometres, why is the Earth's radius 6,370km? Krister Sundelin, lives in Gothenburg, Sweden • Answered August 27, 2017 If the meter was derived from the radius of the earth equaling ten thousand kilometres, why is the earth's radius 6,370 km? It isn't derived from the radius. It is derived f... Read more » 522 58   Is it true that most Europeans can't afford meat? Claire Jordan, worked at National Health Service • Updated April 12 No. Many Europeans can't afford *beef*, which may seem terrible to an American, but that's because here beef is not the dominant and therefore fairly cheap meat it is in the... Read more » 572 59   Why does it take decades if not over a hundred years to decommission a nuclear power station? Gerben Dirksen, Working as Nuclear Safety Advisor • Answered April 5 A hundred years?! This is the location of Germany's first reactor. As you can see, there is no reactor. It was shut down in 1985, and decommissioning ended 2010. Why did it ta... Read more » 4.2K 212   Both of my parents have O+ blood type. My brother is O+, but I'm B+. My parents told me it's because my grandfather on my dad's side is B+, and her mom is O+. Could that be the reason why I'm B+? Charcoal Jerky • Answered April 26 Based on this and only this? No it's not possible. Blood doesn't "jump" a generation. If you're B+ it means one of a few things. One of your parents had to be B+. This could... Read more » 292 48 Read more in your feed

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