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The Late Movies: More Richard Feynman Explanations

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If you enjoyed yesterday's post Richard Feynman Explains Trains, here are some more clips from the same interview -- from a 1983 BBC program called Fun to Imagine.

First up, Feynman explains why mirrors only reflect left-to-right, not top-to-bottom. This clip occurs before yesterday's train explanation; it starts with Feynman talking about his fraternity at MIT.

Next, Feynman explains magnets and challenges "'why' questions." Actually, he doesn't really get into the magnet thing so much, but gives an interesting talk about the magnetic and electric forces, and the nature of asking the question "why?"

Feynman explains ways of thinking (part one of two). The interesting thing in this video is Feynman's description of counting in his mind -- how he uses speech functions to do it, while a colleague uses visual functions. Same outcome, different parts of the brain -- different ways of thinking at work.

More on ways of thinking (part two of two).

Big numbers, stars, and the sun (part one of two).

Big numbers and stars and stuff (part two of two).

And finally, let's talk fire and the little issue of where trees come from.

If you haven't gotten enough yet, check out a bunch more Feynman clips on YouTube user ChristopherJSykes's page.

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Opening Ceremony
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These $425 Jeans Can Turn Into Jorts
May 19, 2017
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Opening Ceremony

Modular clothing used to consist of something simple, like a reversible jacket. Today, it’s a $425 pair of detachable jeans.

Apparel retailer Opening Ceremony recently debuted a pair of “2 in 1 Y/Project” trousers that look fairly peculiar. The legs are held to the crotch by a pair of loops, creating a disjointed C-3PO effect. Undo the loops and you can now remove the legs entirely, leaving a pair of jean shorts in their wake. The result goes from this:

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Opening Ceremony

To this:

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Opening Ceremony

The company also offers a slightly different cut with button tabs in black for $460. If these aren’t audacious enough for you, the Y/Project line includes jumpsuits with removable legs and garter-equipped jeans.

[h/t Mashable]

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This First-Grade Math Problem Is Stumping the Internet
May 17, 2017
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If you’ve ever fantasized about how much easier life would be if you could go back to elementary school, this math problem may give you second thoughts. The question first appeared on a web forum, Mashable reports, and after recently resurfacing, it’s been perplexing adults across social media.

According to the original poster AlmondShell, the bonus question was given to primary one, or first grade students, in Singapore. It instructs readers to “study the number pattern” and “fill in the missing numbers.” The puzzle, which comprises five numbers and four empty circles waiting to be filled in, comes with no further explanation.

Some forum members commented with their best guesses, while others expressed disbelief that this was a question on a kid’s exam. Commenter karrotguy illustrates one possible answer: Instead of looking for complex math equations, they saw that the figure in the middle circle (three) equals the amount of double-digit numbers in the surrounding quadrants (18, 10, 12). They filled out the puzzle accordingly.

A similar problem can be found on the blog of math enthusiast G.R. Burgin. His solution, which uses simple algebra, gets a little more complicated.

The math tests given to 6- and 7-year-olds in other parts of the world aren’t much easier. If your brain isn’t too worn out after the last one, check out this maddening problem involving trains assigned to students in the UK.

[h/t Mashable]

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