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2015年
08月29日
15:50 bbbcさん

TED-Ed 035 If superpowers were real:Super strength (特殊能力が本当にあったなら:超怪力)

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空想科学シリーズ6本 の内の最後の1本に、日本語字幕が付きました。(コメント1
早口だが難しい語はなく、「易しい内容を早く話す」 ので、気楽な耳慣らしに良いでしょう。

 04分・・170wpm   2015/08/29 新出

字幕:上の動画は開始後 で字幕On/Off、 で言語選択。文字サイズはオプションから。
    動画を見るとき、パソコンで画面全体を拡大するときれい。

下記英文はブラウザ クロムのマウスオーバー辞書が使えます。

If you wake up one morning with 1,000 times the strength you had the night before, how will you handle delicate day-to-day tasks? Everything must seem so fragile to you since the scale of your strength has expanded one thousand times.

You'd have to be very careful when you're shaking someone's hand so you don't end up breaking their bones or crushing everyone you hug. And using a fork to pick up a piece of broccoli from a Styrofoam plate without driving the fork through the plate is going to be as difficult as brain surgery.
 Styrofoam:【商標】 スタイロフォーム(発砲スチロールの一種)

Say the day comes and you get the chance to save a damsel in distress falling from a helicopter. So, you hold out your arms, hoping to catch her. Seconds later, you will find yourself holding her lifeless body. What happened? Well, pressure is force divided by area. The smaller the area, the bigger the pressure. This is why we can lift heavy objects without breaking our skin, but a tiny needle can make us bleed with just a little poke.

The pressure that will be exerted on her body can be calculated by force divided by the area on the top of your arms that comes in contact with her. It doesn't matter if your arms are strong enough to catch her body without breaking your bones. Her spine is not strong enough to be caught by you without being damaged.

Even if you rip off the nearest door to provide a bigger area to catch her with, you still wouldn't be able to save her anyway. Remember, it's not the fall that kills her, but the sudden stop at the bottom. Let's say she's falling from a 32 story building, about 300 feet(約90m), and you are 6 feet(約180cm) tall, maybe 10 feet(約3m) on your tippy-toes, with your arms above your head holding a door, in hopes of distributing the pressure across a larger surface area, but all you're doing is essentially moving the ground up by 10 feet.(約3m)

So, she's now falling from 290 feet(約87m), instead of 300(約90m)feet, reaching the speed of 173 feet per second(約50m/s)just before impact, not counting air resistance. It's the equivalent of crashing at 94 miles per hour(約150km/h) into a wall with a door in front of it.

The only thing that could save her is flying. But that power comes with its own host of scientific issues. If you could fly, what you must do is fly up to her, start flying down at the speed she is falling, hold on to her, then gradually slow down until you come to a complete stop.

This process requires a lot of cushion space between the point she starts falling and the ground. Every second you waste on changing into your superhero costume and flying up to her height, her head is getting that much closer to the pavement!

If she's falling from a high place, and you can't get to her until she's only a few feet above the ground, there's really nothing you can do other than magically turn the pavement into marshmellow to allow her enough time to slowly come to a stop.

Then, break out the chocolate and graham crackers(グラハムクラッカー:全粒粉クラッカー) and you've got s'mores(スモア). Mmmm, delicious!
 s'more:スモア・・北米の伝統的な夜間キャンプファイヤーで人気のデザート。
            焼いたマシュマロ とチョコレートの層 を 2枚のグラハムクラッカーで挟んで作る


Now, which superpower physics lesson will you explore next? Shifting body size and content, super speed, flight, super strength, immortality, and invisibility.
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2015年
08月29日
15:52
bbbcさん

【TED-Ed 空想科学シリーズ】
はじめの三つは易しい。
 ・04分・170wpm特殊能力が本当にあったなら:超怪力・・・英文035 (本ページ)
 ・05分・170wpm特殊能力が本当にあったなら:透明の力英文036
 ・05分・170wpm・特殊能力が本当にあったなら:不死の力英文037
下記三つは少し科学知識が要る。
 ・05分・170wpm特殊能力が本当にあったなら:超高速・・・英文038
 ・05分・170wpm特殊能力が本当にあったなら:飛行. ・・・・英文039
 ・07分・170wpm特殊能力が本当にあったなら:巨大化・・・英文040

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