SCRAT - SURPRISE - ICE AGE 5 - SCRAT & THE SCIENCES OF UNIVERSE - ENG - video Dailymotion

Scrat-tissime

SURPRISE WITH SCRAT

Transcript

00:00I'm Neil deGrasse Tyson, the director of the Hayden Planetarium at New York City's American

00:14Museum of Natural History.

00:16And I've been asked by the producers to investigate the science behind the movie Ice Age Collision

00:22Course.

00:22You've seen the effects of space travel, planetary shifts, and the force of gravity.

00:33But how do they actually work?

00:36For these answers, you'll need to ask an expert in astrophysics.

00:40Luckily, I am one.

00:43So bring it on.

00:51First question.

00:53In the movie, Scrat reaches the moon in 16.5 seconds.

01:01How fast would Scrat have to be traveling to reach the moon in that time?

01:05You know, it's not how fast he gets there, it's how quickly he'd have to accelerate to

01:09reach the speed necessary to get there in 16.5 seconds.

01:12And that acceleration would squash him into a pile of goo at the back of the spaceship.

01:17The moon is about a quarter million miles away.

01:20A quarter million miles divided by 16.5 seconds, it's going to carry the two, it comes out

01:27to about 16,000 miles per second.

01:32Next, Scrat accidentally, Scrat accidentally does everything.

01:42Scrat accidentally forms our solar system at the beginning of the movie.

01:45Which takes place in the ice age.

01:48How long ago was our solar system actually formed?

01:50There was a lot of loosey-goosey movement with the timeline in this film.

01:54You know, we think the ice age was like a zillion years ago, and it was like tens of thousands

02:00of years ago.

02:01Dinosaurs went extinct 65 million years ago.

02:05A billion years ago, we had single-celled organisms.

02:09Four billion years ago, the solar system was formed.

02:14From collisions of objects, orbits unstable, cast hither and yon.

02:23And Scrat was there, because Scrat caused it.

02:27Next question, Scrat uses a tractor beam to shoot a planet towards Jupiter, and it bounces

02:39off, creating a big red spot.

02:44What is Jupiter's big red spot?

02:46Jupiter's red spot is a storm.

02:48It is a cyclone, except it's spinning the opposite direction from cyclones on Earth.

02:52So we call it an anti-cyclone.

02:54And it's a storm that's been raging for more than 300 years.

02:59Jupiter rotates twice as fast as Earth, and your rotation rate gives energy to spinning

03:04storms on a planetary surface.

03:07So Jupiter has storms bigger than Earth.

03:10You can fit multiple Earths inside Jupiter's red spot.

03:14So don't mess with Jupiter.

03:20Next question.

03:23The asteroid belt witnesses two planets collide, which results in the creation of the asteroid

03:30belt.

03:31How do asteroid belts actually form?

03:32Well, we know we have an asteroid belt, and it's a region of craggy rocks between the orbit

03:38of Mars and Jupiter.

03:40Asteroids are pieces of planets that have broken apart and collected in that belt in orbit around

03:45the sun.

03:46There's countless asteroids there.

03:48But if you glued them together into one single object, one single mass, you get like 5% the

03:57mass of our own moon.

04:00So there's really not much total material there.

04:03Our asteroid belt is not nearly as massive as the one Scrat witnessed.

04:07But I think Scrat created that asteroid belt.

04:14He was messing everything up in the early solar system.

04:18No, I shouldn't say he messed it up.

04:19He turned it into the solar system we have come to know and love.

04:23Thank you, Scrat.

04:26Next question.

04:31What are the conditions of an electrical storm like?

04:33Hurry, Granny!

04:34Don't you hurry me!

04:36I've been struck by lightning more times.

04:38Ah, Granny!

04:39Then you've had hot breakfasts.

04:42Can static electricity actually be harnessed?

04:45Oh, no.

04:48We're all familiar with static electricity.

04:50You know, you're wearing socks, took your shoes off, and you're on a wool carpet, and you

04:54rub your feet, and you touch the doorknob, there's an electric shock.

04:57Everyone, try not to create any sort of friction.

05:00No friction.

05:01Got it.

05:02Yup, cool beans.

05:04Friction is what now?

05:05When you build up charges over here, and if there are more charges here than there, and

05:09you bring them near one another, it'll gap across the air and transfer until they're exactly

05:14equal.

05:15Because electricity doesn't like being unequal.

05:18In Ice Age Collision Course, all these rocks had extra static electricity sitting there.

05:23No.

05:24No.

05:25No.

05:26That gets a D minus, if I were to grade it.

05:30Because the rock is sitting on Earth, and the Earth is this huge repository of charges.

05:35If you have excess charges on a rock, and the rock is sitting on the ground, the charges

05:38go into the Earth.

05:40Like that.

05:41It's not going to wait around for you to walk through it, and then send charges back and

05:44forth to you, as they did in the movie.

05:47So it was fun to watch everyone get electrocuted several hundred times, so I'll give it to them.

05:58This movie features magnetic crystals.

06:01Are there magnetic crystals on Earth?

06:05How do they behave, and where do they come from?

06:08Actually, any crystal I've ever played with was not magnetic.

06:13And none of the crystals in a geode are magnetic.

06:15So I don't want to say no on this one.

06:17I'm going to say, I don't know.

06:19Sorry, I can't help you.

06:20I'm an astrophysicist, not a geologist.

06:22Simpleton!

06:23Nankapope!

06:24Next question.

06:27Would you be able to alter gravity in space like Scrat does in a spaceship?

06:33In supergravity mode, why does the acorn flatten Scrat out?

06:38On the alien spaceship, they can control the force of gravity with a lever that he happens

06:43to knock into gravity mode 56 G.

06:47The acorn now weighs 56 times what it did before.

06:56Now, acorns don't really weigh that much.

06:58An ounce, at most.

07:00So 56 times that, that's like four pounds.

07:03Yeah, there's no reason for it to completely flatten them out.

07:06Given other things that Scrat goes through in the movie.

07:09Like doors slamming on him.

07:12I mean, I felt sorry for him, but not when the acorn rolled over him.

07:16No.

07:17No.

07:18I felt sorry for him when his teeth fell out.

07:23Next question.

07:25When Scrat is floating in space, he's able to move around at varying speeds.

07:30Is this actually possible?

07:33Well, unless you have retro rockets or you can strategically burp in one direction or another.

07:40Once you're floating in space, you will continue floating in that direction until some force

07:45acts upon you from the outside.

07:48That's one of Newton's laws of motion.

07:50We haven't known that for hundreds of years.

07:52So, unless Scrat got alien technology, all bets are off.

07:57But if he's just floating?

07:59No.

08:00No.

08:01No.

08:02He'll just float.

08:03Forever.

08:05Unavailable to make another movie for you.

08:07One last question.

08:11Would you be able to hear Scrat scream in space?

08:16If Scrat is in a spaceship and that spaceship has air and Scrat screams, yeah, you'll hear

08:21it.

08:22The sound waves vibrate the air molecules and it'll go from Scrat's mouth to your ear.

08:27Sure.

08:28If Scrat is in a space suit in space and Scrat screams, you're not going to hear it.

08:33You have to stick your ear on the helmet.

08:36And then you can hear the vibrations from the mouth through the air in the helmet to the

08:41glass of the helmet to your eardrum.

08:43But through space, no one can hear you scream.

08:48AAAAAH!!!

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SCRAT - SURPRISE - ICE AGE 5 - SCRAT & THE SCIENCES OF UNIVERSE - ENG

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