25 MILLION Orbeez in a pool- Do you sink or float?

By Grover Koelpin 100 comments

A while back I was eating lunch with
some co-workers and we were debating about just how far you would sink if you
jumped into a pool of these orbeez For example would it go up to your calf
or to like your waist or all the way above your head Everyone seemed to have
a different theory, in fact I asked about a hundred people and you can see how
much the guess is varied, so as a firm believer in the scientific method I
decided to test our hypotheses So I’m here today in the backyard of the
backyard scientist. so for the past six months we’ve been stockpiling these
orbeez in Kevin’s backyard and today it’s finally the moment of truth all right you ready for this let’s do it
so take a moment to guess in the comments below of how far you think we’ll
sink and then we’ll see if you’re right For the record I think I will sink to about
the waist, okay here we go This Feels so crazy This feels like its compressed on all sides but
it’s so smooth and like slippery So it looks like I was wrong by quite a bit
and we have to reject the null hypothesis So now what I decided to call
up my nephews you guys want to come swimming at my friend’s house in my
ongoing quest to be the favorite uncle only I might have forgotten to tell them
there’d be no water in the pool also that kevin was right there You guys ready to go swimming in this But before we go swimming in 25 million orbeez let’s talk about why I was wrong It has to do with buoyancy so here’s a riddle when
this ice melts will the water level go up or down as you can see here it
actually doesn’t change at all Archimedes taught us that you displace
your weight in water so this baseball weighs about 135 grams
and when I put it in water it will sink until it is pushed out 135 grams worth
of water at which point it’s in equilibrium and it floats and since the
waterline is about halfway up the baseball you know it’s about half as
dense as water and this is why scooby-doo quicksand is pure lies you
sink until you’ve displaced your weight in quicksand and since it’s about twice
as dense as a person you Bob like a cork about halfway down and it’s impossible
to sink so Atreyu relax your horse is going to float So I
will keep sinking in Orbeez until I have displaced my weight in Orbeez and since
they’re a little more dense than me and taking account the packing efficiency of
a sphere surrounded by water the fact that about 85 percent of me sank makes
sense I thought the friction between the balls
would play a bigger role which is why I guessed halfway so I was wrong but a lot
of times that’s more fun because that means the result was unexpected and you
learn something okay back to the pool Guess where my foot is So a huge thanks to Kevin for letting us
use his pool he actually also made a video we did eight crazy experiments
with a pool full of water balls so go check that out because his footage is
amazing as always I also want to thank Squarespace for helping to make this
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that I have in the works thanks for watching If you really liked that or if
you really didn’t like it or if you’re like mehh then you should definitely subscribe
I can wait



Oct 10, 2019, 4:44 pm Reply

Dude how would it be to swim in oobleek

Jason Harden

Oct 10, 2019, 7:34 pm Reply

All the way


Oct 10, 2019, 10:08 pm Reply


legoy alex

Oct 10, 2019, 10:34 pm Reply

mr beast:lets go more
(does 4x)


Oct 10, 2019, 12:28 am Reply

sink : waist

Savannah Thorne

Oct 10, 2019, 12:36 am Reply

up to waist


Oct 10, 2019, 2:56 am Reply

The kid getting stuck at 4:18🤣🤣

Angelina Cassab

Oct 10, 2019, 6:22 am Reply

I think he will sink to head height

Alexander kBoogBk

Oct 10, 2019, 11:53 am Reply

Remove the water.


Oct 10, 2019, 3:59 pm Reply

I like how you promote environmentally friendly things but then you just fill a pool with 25 million plastic balls

Eli Hodson

Oct 10, 2019, 8:44 pm Reply

to your neck

My Name Is Not That Hard To Spell

Oct 10, 2019, 10:47 pm Reply

I really like the music

Guadalupe Garcia

Oct 10, 2019, 12:11 am Reply

Guy comes out of a sewer full of orbeez

Pennywise: who the hell do you think you are

Guadalupe Garcia

Oct 10, 2019, 12:13 am Reply

:Mark finally becomes the favorite uncle

:Mark has left the server

2 AGDollstudios

Oct 10, 2019, 12:19 am Reply

1:10 it’s a boy!


Oct 10, 2019, 5:41 am Reply



Oct 10, 2019, 5:32 pm Reply

omg kevin didnt turn up again

Missy Cat

Oct 10, 2019, 6:47 pm Reply

Mark Rober: how many different things could i put in my pool

Samiha Carrim

Oct 10, 2019, 7:03 pm Reply


Ooohjeee H

Oct 10, 2019, 7:29 pm Reply

To your hips but becouse he fat he will go to his head

Kelvin Dang

Oct 10, 2019, 11:18 pm Reply

Craft a water ball blaster


Oct 10, 2019, 12:14 am Reply

your fat ugly

Alexa Macdonald

Oct 10, 2019, 12:25 am Reply

you should do a pool full of oobleck

Eli You don’t need to know

Oct 10, 2019, 1:40 am Reply


gachakittenlover825438 Casillas

Oct 10, 2019, 2:40 am Reply

I think it go to head anostly

Dayna Lambeth banana

Oct 10, 2019, 3:28 am Reply

To your NEC

Turtle Dabs

Oct 10, 2019, 5:01 pm Reply

I think you would sink all the way

Samantha Quant

Oct 10, 2019, 5:03 pm Reply

Did he just say you can’t sink into quicksand?

Kelvin Dang

Oct 10, 2019, 8:53 pm Reply

Above head is my guess

Bisma Khan

Oct 10, 2019, 10:56 pm Reply


Danny Nguyen

Oct 10, 2019, 11:24 pm Reply

The kid with OCD shouldn’t see this video

Patricia Ruiz

Oct 10, 2019, 1:50 am Reply

So umm I think waist

Bamfmclovin 68

Oct 10, 2019, 8:24 am Reply

I have that same orange toy figure in the middle in the cup of orbes in the beginning of the video

Catman Winner

Oct 10, 2019, 8:34 am Reply


zachary finazzo

Oct 10, 2019, 4:22 pm Reply

I love your videos and I just started watching them!

Praetzel Projects

Oct 10, 2019, 5:40 pm Reply

All the way?


Oct 10, 2019, 6:17 pm Reply

4:17 that kid almost died….

Emojis Rule

Oct 10, 2019, 8:00 pm Reply

I think he was the favourite uncle a long time ago

Miguel Venegas

Oct 10, 2019, 2:19 pm Reply

Why is there always sciieennccce

Erin Goodwin

Oct 10, 2019, 4:01 pm Reply

You are most definitely the favorite uncle!!!(・◡・)/ congratulations!!!

Da Bac0n

Oct 10, 2019, 4:41 pm Reply

1:09 a legend was born

Heidi Leitner

Oct 10, 2019, 7:33 pm Reply

Can you make a pool of slime. Pleas

Deborah Parker

Oct 10, 2019, 11:10 pm Reply

I Loved 👍👍👍👍

Kason Nelson

Oct 10, 2019, 12:26 am Reply

I said nipples

Nick Poynter

Oct 10, 2019, 2:12 am Reply

To the head I think

Kids from Down Under / Вверх Ногами

Oct 10, 2019, 2:33 am Reply

3:19 he roasted that girl so bad

FAF _D4pper

Oct 10, 2019, 2:48 am Reply

Neck high

Daksh Jain

Oct 10, 2019, 4:43 am Reply



Oct 10, 2019, 11:38 am Reply




Oct 10, 2019, 12:03 pm Reply

best content found on youtube

Typxcal Bill

Oct 10, 2019, 1:01 pm Reply



Oct 10, 2019, 3:38 pm Reply

Who wouldn't LOVE uncle Mark, AWESOME

Qazwsxedc Qaz

Oct 10, 2019, 3:56 pm Reply

Mrs nay I don’t need this boys dump them

Smith Family

Oct 10, 2019, 4:51 pm Reply


Thederpdude76 Gamer

Oct 10, 2019, 4:53 pm Reply

4:31 ewwww

Badd Man

Oct 10, 2019, 7:08 pm Reply

So I need a uncle this cool lol


Oct 10, 2019, 9:12 pm Reply

Maby you’ll sink like a little over half way

Yeong YTV

Oct 10, 2019, 9:09 am Reply

Water crystal ball 水晶宝宝

Bana Abo Daken

Oct 10, 2019, 12:38 pm Reply

Half way

Gösta Nilsson

Oct 10, 2019, 12:54 pm Reply

all the way

Galaxy Kitty

Oct 10, 2019, 4:19 pm Reply

1:57 a beautiful orbeez dress, the perfect picture!
👇 Click here to take a pic. XD

Alysha Hooker

Oct 10, 2019, 5:29 pm Reply

Lol 1:11

Alysha Hooker

Oct 10, 2019, 5:29 pm Reply


Generator :3 / Генератор :3

Oct 10, 2019, 6:34 pm Reply

Я один русский?


Oct 10, 2019, 8:14 pm Reply

I wonder how it went down at the cashier

Kaylee Baglio

Oct 10, 2019, 8:57 pm Reply

It depends how good you are at swimming. If you’re really good, calf. If you’re not the best but you still can, about half of your body . If you can barely swim, almost your entire body

Kaylee Baglio

Oct 10, 2019, 9:00 pm Reply

2:13 though..lol

Ariel Larisey

Oct 10, 2019, 10:23 pm Reply

I think that you will sink up to your chest

Paint the World

Oct 10, 2019, 12:29 am Reply

I think they will fall all the way down but maybe not above their head though

Jelaah Jackson

Oct 10, 2019, 2:31 am Reply

new quest: look for comments from 3 years ago


Oct 10, 2019, 10:18 am Reply

Half way

Elen Monahov

Oct 10, 2019, 6:13 pm Reply

I love orbeez pool


Oct 10, 2019, 6:42 pm Reply

1:10 I died


Oct 10, 2019, 7:11 pm Reply

Mr.Beast 2.0

I’m definitely not Mario I Am The One

Oct 10, 2019, 1:32 am Reply

its pronounced hypothesis not hypothesis


Oct 10, 2019, 6:35 am Reply

I learn more on this channel than at school


Oct 10, 2019, 1:00 pm Reply

Up to the neck

Chase Hills

Oct 10, 2019, 2:39 pm Reply

I think up to your shoulders

Will Starcevic

Oct 10, 2019, 8:40 pm Reply

Half way

Sibylla Meyer

Oct 10, 2019, 9:11 pm Reply

Hmmm I think my hed


Oct 10, 2019, 12:55 am Reply


Fiter Jet

Oct 10, 2019, 3:20 am Reply

Normal water with a little bit more friction 👌


Oct 10, 2019, 8:58 am Reply

How much did it cost?

Dr. Rimi Biswas

Oct 10, 2019, 9:32 am Reply

Your water balls will eat you

I hate it

soul crusher

Oct 10, 2019, 11:10 am Reply


Nameera Zee

Oct 10, 2019, 1:56 pm Reply

Above your chest.

Commander Cody

Oct 10, 2019, 6:08 pm Reply

to the neck

Jaxon Swonger

Oct 10, 2019, 3:37 am Reply

All the under

Michael Batters

Oct 10, 2019, 11:10 am Reply

3:11 I watched this movie once and this scene destroyed my childhood

timothy Palleti

Oct 10, 2019, 1:26 pm Reply

Very nice I like it😊

Adhil Haneef

Oct 10, 2019, 5:04 pm Reply

How did you cleaned that

Salvador core

Oct 10, 2019, 9:25 pm Reply

At least he is better than morgiz


Oct 10, 2019, 11:16 pm Reply

5:27 Kevin from the backyard scientist is now turning slightly creepy

Kauan_inocencio Inocencio

Oct 10, 2019, 2:56 am Reply

E do Brasil?


Oct 10, 2019, 9:47 am Reply

I guess your wast!

Henry Cabrera

Oct 10, 2019, 10:00 am Reply

You will sink

horrible sans

Oct 10, 2019, 3:49 pm Reply

To ure head

Mike Stevenson

Oct 10, 2019, 9:51 pm Reply

0:25 I have those toys

Jessica Halvorson

Oct 10, 2019, 12:55 am Reply


Katelynn Sevrence

Oct 10, 2019, 8:28 pm Reply

Above my head

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