Wow – Xochielt Sanchez #xochielt
Answer by Varun Hrishikesh Sharma:
He purchased a Royal Enfield 500cc so that he could take his girlfriend for long drives.
But unfortunately, he was not able to talk to her while riding due to its loud noise, so he sold his Royal Enfield and bought a Honda Activa.
He got married to his girlfriend and one year later he bought a Royal Enfield 500cc.
What are some 3 line stories, where the story changed dramatically with each line?
– Xochielt Sanchez #xochielt
Answer by Clayton C. Anderson:
The International Space Station (ISS) flies around the earth in a near circular orbit. The current altitude for that orbit is somewhere around 250 nautical miles. Given that altitude, the period, or time for one orbit is approximately 90 minutes. With a 90 minute orbit and a 24 hour day, the ISS will circle the Earth 16 times a day. That's 16 sunrises and 16 sunsets each orbital day. Makes for some great picture taking opportunities!
Keep lookin' up… you might see ISS somewhere in her 90 minute orbit!
How many rotations does the ISS make per day around Earth? Does the number change?
– Xochielt Sanchez #xochielt
Answer by Adriana Heguy:
Mammals, unless they are natural flyers or gliders, have fear of heights. It is instinctual; otherwise what would prevent them from jumping off cliffs? Human beings are also born with fear of heights and falling, it's not simply taught (https://en.m.wikipedia.org/wiki/…).
Almost nobody is strong enough to push a tiger off a cliff; a tiger weighs about 800 lbs! So even if the tiger was unconscious, it would take a professional strong man or a bunch of average men to do that.
If the tiger was conscious, well, I don't think I need to tell you what would happen to guy trying to push on a tiger's rump.
Do wild predators like tigers see it as an act of aggression if one tries to push them off a cliff?
Cool – Xochielt Sanchez #xochielt
Answer by Adriana Heguy:
No. The ancestors of whales were land mammals. The earliest known whale ancestor lived 50 million years ago and was called Pakicetus (the fossil is from Pakistan): http://www.amnh.org/explore/news…
It looked like this:
After Pakicetus, the next fossil that is in the whale lineage is Ambulocetus (http://www.amnh.org/explore/news…). It looked a bit like a crocodile, I think.
UC Berkeley has a very nice page on the evolution of whales: http://evolution.berkeley.edu/evolibrary/article/evograms_03
Did aquatic dinosaurs like those depicted in Jurassic World evolve into modern whales?
@Quora: What are the day-to-day activities of an engineering director at Google? – Xochielt Sanchez #xochielt
What are the day-to-day activities of an engineering director at Google?
Answer on @Quora to In which country do you feel the most free: the USA or – Xochielt Sanchez #xochielt
Answer by Janette Nash:
I am a Brit who has now lived in the USA for nearly 12 years. The UK may have changed since I was last there, and I question the word "freer" – I am free in both countries insofar as I am not imprisoned – but for freedom equalling feeling safe, definitely the UK.
I can walk the streets without fearing death by gunshot – either from a madman, or from a police officer. Officials in the UK don't treat me like a criminal until proven otherwise, as they do in the US. Bureaucracy is much more accessible. Everyone else has mentioned the health aspect.
I am a law-abiding citizen in any country where I live, but am treated as a human being in the UK. My (American) husband felt the same way in the 5 years he lived in England.
In which country do you feel the most free: the USA or the UK?
Answer on @Quora by @RobertFrost01 to Why do the astronauts have books for troubleshooting? – Xochielt Sanchez
Answer by Robert Frost:
No, it wouldn't be feasible to memorize the procedures. Just the two ISS Emergency books total 1363 pages (although some pages are English/Russian translations). The ISS Warning books are considerably longer.
A spacecraft like the ISS or Space Shuttle is massively complex. Operating one requires great care. A stupid mistake can cause hundreds of millions of dollars of damage or even get someone killed. Astronauts and flight controllers are trained to not operate by memory. They are trained so that certain critical skills become automatic and don't require significant conscious thought, but they are also trained to follow the procedures.
Imagine you are in the ISS and a fire alarm has initiated and there is smoke and noise and danger. Quick, can you remember if the CRK is supposed to be deactivated when the CO2 concentration is less than 1.6% or 1.3%? Do you doff the mask when HCl concentration is less than 5 ppm or 3 ppm? Which DDCU do you shutdown to cut power to the Japanese module? On which laptop display can you quickly verify if the Lab IMV is isolated? How about the Node 2 IMV? What's the Tres for a 1mmHg drop in 19 seconds? What happens if you forget to disconnect the ВД (ventilation duct) in the МИМ1 – СУ(FGB) hatchway during leak pinpointing? What order must the three operational controls protecting the crew from electric shock have to be removed or put in place? When isolating ПхО do you power off ППС-21 or ППС-22? How much time is lost when you send the execute command without first sending the arm command?
Not to mention many procedures require multiple people to work together, performing their separate steps in a specific sequence.
Procedures, checklists, and cue cards help ensure people do things correctly when under pressure and greatly reduce the amount of training required.
Why do the astronauts have books for troubleshooting?