Roberto Abraham Scaruffi

Why is the fundamental theorem of calculus nontrivial? David Joyce, always learning 27 votes No, it's not the definition of the derivative. Indeed, it doesn't define anything. It's a theorem which says when you graph the derivative, then the signed area under the... Read More »

What is wrong with this resume? Gayle Laakmann McDowell, Author: Cracking the Coding Interview... 51 votes Honestly, I think it's a great resume. It's easy to read. It doesn't waste much time talking about less relevant skills. You've given specific accomplishments. You've shown... Read More »

How can I solve ? Barak Shoshany, Graduate Student at Perimeter Institu... 110 votes A trivial solution for any equation of the form  is . However, these solutions are obviously uninteresting. We are looking for solutions with . Just by trying out a few sm... Read More »

What are the weirdest things flight attendants have seen in their line of duty? Liz Corcoran 3.9k votes People lose their minds and all sense of reality when they step through the door of an aircraft. I've had people wanting to know what altitude we are at before we have tak... Read More »

Why do we see a red color when we hold our palm against a light source? Dale Thomas, Graphics programmer and writer of sci... 1.2k votes Others have given some great answers. But I want to mention that this is a current hot topic in computer graphics. Skin and tissue are slightly translucent, so light can pe... Read More »

Who is an example of a modern-day Da Vinci? Mark Harrison, Running technology at FundingKnight (... 549 votes Brian May, the guitarist from Queen. Erm, I mean Brian May, Chancellor of the John Moores University, the university head. ... Read More »

Why doesn't  equal  ? Viktor Toth, IT pro, part-time physicist 1.9k votes Others provided you with the algebra and explained that exponentiation does not distribute over addition, but here is a way to think about this in terms of geometry: This ... Read More »

When and where do soldiers in an active war-zone sleep? Dan Rosenthal, Former Foreign Service Officer, Iraq ... 248 votes Other people can address the WWII aspects of this question -- I'm going to walk you through a day-in-the-life from when I was in Iraq. To do this, I'm going to have to skip... Read More »

What are the funniest things Southwest flight attendants have said? Derek Schatz, Relentlessly curious, loves food, air... 4.0k votes My favorite: (as the plane has just arrived at the gate and people started standing up while the seatbelt light was still on) ... Read More »

What are the optimal siege tactics for taking Magic Kingdom's Cinderella Castle? Jon Davis, Writer and Blogger on Military, Veter... 1.3k votes Operation It's a Small War After All Prepared by Sgt. Jon Davis USMC I chose to ignore the stipulation of a pre-gunpowder based strategy because the fortifications defendi... Read More »