If superpowers were real: Super strength - Joy Lin

Če bi nadnaravne moči obstajale: Nadnaravna moč - Joy Lin

2,201,950 views

2013-06-28 ・ TED-Ed


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If superpowers were real: Super strength - Joy Lin

Če bi nadnaravne moči obstajale: Nadnaravna moč - Joy Lin

2,201,950 views ・ 2013-06-28

TED-Ed


Za predvajanje videoposnetka dvakrat kliknite na spodnje angleške podnapise.

Translator: Klavdija Cernilogar Reviewer: Nika Kotnik
00:13
If you wake up one morning
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Če bi se nekega jutra zbudili
00:15
with 1,000 times the strength you had the night before,
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tisočkrat močnejši,
00:19
how will you handle delicate day-to-day tasks?
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kako bi opravljali drobne vsakodnevne naloge?
00:23
Everything must seem so fragile to you
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Vse bi se zdelo tako krhko,
00:26
since the scale of your strength
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saj bi se obseg vaše moči
00:27
has expanded one thousand times.
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tisočkrat povečal.
00:31
You'd have to be very careful
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Morali bi biti zelo previdni,
00:32
when you're shaking someone's hand
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ko bi nekomu segli v roko,
00:34
so you don't end up breaking their bones
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da jim ne bi zdrobili kosti
ali zmečkali vsakega, ki bi ga objeli.
00:36
or crushing everyone you hug.
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00:41
And using a fork to pick up a piece of broccoli
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Na vilico nabosti brokoli
00:43
from a Styrofoam plate
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na stiropornem krožniku
00:44
without driving the fork through the plate
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ne da bi vilice potisnili skozenj,
00:46
is going to be as difficult as brain surgery.
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bi bilo zahtevno kot operacija možganov.
00:51
Say the day comes
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Kaj če se zgodi,
00:52
and you get the chance to save a damsel in distress
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da dobite priložnost rešiti damo v težavah,
00:55
falling from a helicopter.
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ki je padla iz helikopterja.
01:00
So, you hold out your arms,
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Iztegnete roke,
01:01
hoping to catch her.
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da bi jo ujeli.
01:02
Seconds later, you will find yourself
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Čez nekaj sekund
01:05
holding her lifeless body.
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držite njeno truplo.
01:07
What happened?
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Kaj se je zgodilo?
01:08
Well, pressure is force divided by area.
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Tlak je sila deljena s površino.
01:11
The smaller the area,
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Manjša ko je površina,
01:12
the bigger the pressure.
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večji bo tlak.
01:13
This is why we can lift heavy objects
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Zato lahko dvigamo težke predmete,
01:15
without breaking our skin,
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ne da bi si raztrgali kožo,
01:17
but a tiny needle can make us bleed
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a že majhna igla povzroči krvavitev
01:19
with just a little poke.
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s čisto majhnim pikom.
01:21
The pressure that will be exerted on her body
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Tlak, ki bo deloval na telo dame,
izračunamo, če silo
01:24
can be calculated by force
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01:25
divided by the area on the top of your arms
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delimo s površino rok,
01:28
that comes in contact with her.
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ki pride v stik z dekletom.
01:29
It doesn't matter if your arms are strong enough
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Ni važno, ali so roke dovolj močne,
01:31
to catch her body without breaking your bones.
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da bi jo ujele, ne da se vam kosti zlomijo.
01:34
Her spine is not strong enough
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Njena hrbtenica je prešibka,
01:35
to be caught by you without being damaged.
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da bi jo ujeli brez poškodb.
01:37
Even if you rip off the nearest door
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Tudi če s tečajev snamete vrata,
01:39
to provide a bigger area to catch her with,
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da bi jo ujeli na večji površini,
01:43
you still wouldn't be able to save her anyway.
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je ne boste mogli rešiti.
01:47
Remember, it's not the fall that kills her,
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Ne bo je ubil padec,
01:50
but the sudden stop at the bottom.
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temveč nenadna ustavitev na tleh.
01:52
Let's say she's falling from a 32 story building,
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Če pade z 32-nadstropne stavbe,
01:55
about 300 feet,
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okoli 90 metrov,
01:56
and you are 6 feet tall,
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vi ste visoki 1.80 metra,
01:57
maybe 10 feet on your tippy-toes,
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morda dva metra, če ste na prstih,
01:59
with your arms above your head
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z rokami nad seboj,
02:00
holding a door,
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držite vrata,
02:01
in hopes of distributing the pressure
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da bi tlak razdelili
na večjo površino,
02:03
across a larger surface area,
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02:04
but all you're doing is essentially moving
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vam je še vedno uspelo le to,
02:06
the ground up by 10 feet.
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da ste tla dvignili za dva metra.
02:08
So, she's now falling from 290 feet,
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Torej bo padla z 88 metrov,
02:10
instead of 300 feet,
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namesto 90,
02:12
reaching the speed of 173 feet per second
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s hitrostjo 52 m/s
02:14
just before impact,
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tik pred udarcem v tla,
02:16
not counting air resistance.
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če ne upoštevamo zračnega upora.
02:18
It's the equivalent of crashing at 94 miles per hour
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To je enako, kot če bi se s hitrostjo 150 km/h
02:21
into a wall with a door in front of it.
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zaleteli v zid z vrati pred njim.
02:27
The only thing that could save her is flying.
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Samo letenje jo lahko reši.
02:30
But that power comes with its own host of scientific issues.
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A ta moč ima svoje znanstvene težave.
02:34
If you could fly,
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Če bi lahko leteli,
02:36
what you must do is fly up to her,
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bi morali odleteti k njej,
02:38
start flying down at the speed she is falling,
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začeti leteti navzdol s hitrostjo njenega padanja,
02:40
hold on to her,
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jo prijeti,
02:42
then gradually slow down
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potem pa upočasniti letenje,
02:43
until you come to a complete stop.
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dokler se ne bi ustavili.
02:48
This process requires a lot of cushion space
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To zahteva veliko prostora
02:50
between the point she starts falling and the ground.
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med začetkom padanja in tlemi.
02:53
Every second you waste
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Vsaka sekunda,
02:54
on changing into your superhero costume
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ki jo porabite za skok v kostum super heroja
02:56
and flying up to her height,
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in za let k njej,
02:58
her head is getting that much closer to the pavement!
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pomeni, da je njena glava toliko bliže pločniku.
03:01
If she's falling from a high place,
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Če pada z velike višine
03:02
and you can't get to her
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in jo dosežete šele,
03:03
until she's only a few feet above the ground,
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ko je komaj kak meter nad tlemi,
03:05
there's really nothing you can do
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ne morete storiti ničesar,
03:07
other than magically turn the pavement
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razen začarati pločnik,
03:10
into marshmellow
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da postane pena,
03:11
to allow her enough time to slowly come to a stop.
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da se bo lahko počasi ustavila.
03:16
Then, break out the chocolate and graham crackers
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Dodajte še čokolado in graham krekerje,
03:19
and you've got s'mores.
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pa dobite odličen piškot.
03:21
Mmmm, delicious!
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Mmmm, okusno!
03:26
Now, which superpower physics lesson
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Katero nadnaravno moč
03:29
will you explore next?
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boste raziskali zdaj?
03:31
Shifting body size and content,
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Spreminjanje velikosti in sestave telesa,
03:35
super speed,
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super hitrost,
03:37
flight,
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letenje,
03:39
super strength,
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nadnaravno moč,
03:41
immortality,
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nesmrtnost
03:44
and
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in
03:46
invisibility.
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nevidnost.
O tej spletni strani

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