A Hot Tub Filled with Liquid Sand | Outrageous Acts of Science
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A Hot Tub Filled with Liquid Sand | Outrageous Acts of Science


♪♪ Narrator:
FRIEND OF THE SHOW MARK ROBER IS BACK WITH A HOT NEW TAKE
ON THE HOT TUB. I’M SITTING IN A HOT TUB FILLED
TO THE BRIM WITH SOLID SAND. [ LAUGHS ] WHAT?! Narrator: MARK IS TURNING
SOLID SAND INTO A LIQUID, AND IT’S MAKING A SPLASH ONLINE
WITH OVER 24 MILLION VIEWS. THIS IS JUST INCREDIBLE. [ INDISTINCT SHOUTING ] I REALLY WANT ONE OF THESE
IN MY HOUSE. NO, SERIOUSLY, I DO WANT ONE OF
THESE [Laughing] IN MY HOUSE. Narrator: WE’RE HOT-FOOTING IT
OVER TO CALIFORNIA TO TAKE A DIP
INTO OUR FIRST QUANTUM LEAP. I WANTED TO CAPTURE THE TRUE,
LIKE, FIRST REACTION OF WHAT IT FELT LIKE
WHEN WE TURNED IT ON, AND SO WHEN I’M SITTING THERE
AT THE BEGINNING, THAT’S LEGITIMATELY THE FIRST
TIME THAT WE TURNED IT ON. [ LAUGHS ] AND THE SENSATION OF JUST
SITTING ON SOMETHING THAT’S COMPLETELY SOLID AND THEN, SUDDENLY,
IT JUST LIQUIFIES. IT’S A CRAZY, WEIRD,
WEIRD FEELING. THE WHOLE BUILD TOOK US
ABOUT 2 MONTHS. I’D SAY HALF OF THAT WAS JUST
DOING THE PROTOTYPES AND GETTING ALL OF THAT,
LIKE, FIGURED OUT, THE GENERAL PRINCIPLES, AND THEN THE OTHER HALF WAS
ACTUALLY BUILDING THE HOT TUB. Narrator:
NO, IT SURE WASN’T QUICKSAND, SO HOW DID MARK UPGRADE
THIS HOT SAND PIT? MARK HAS MADE WHAT IS KNOWN
AS A FLUIDIZED BED. Parker: THIS IS WHERE AIR IS
PUMPED THROUGH THE SAND, WHICH MAKES IT BEHAVE
LIKE A LIQUID. WHEN THE AIR IS SWITCHED OFF…
[ LAUGHS ] …IT RETURNS TO BEHAVING
MORE LIKE A SOLID. IT JUST STOPS, AND YOU’RE,
LIKE, LOCKED IN PLACE. MARK HAS 18 COPPER PIPES THAT RUN SIDE BY SIDE
AT THE BOTTOM OF THE HOT TUB. INTO THESE, HE’S DRILLED
OVER 2,500 HOLES WHICH ARE REGULARLY SPACED
AND ALL POINTING DOWN SO THE SAND DOESN’T
GET STUCK IN THEM. THOSE PIPES ARE WELDED
TO ONE BIG PIPE THAT’S CONNECTED TO THREE
CYLINDERS OF NITROGEN GAS. THEN MARK FILLS THE HOT TUB
WITH OVER ONE TON OF DRY SAND. Narrator: BUT HOW DOES HE MAKE
THE SAND ACT LIKE A LIQUID? WHEN MARK OPENS
A NITROGEN CYLINDER, THE GAS GOES BETWEEN
THE SAND GRAINS, REDUCING THE FRICTION
IN BETWEEN THEM. THE GAS PROVIDES AN UPWARD FORCE
ON EACH GRAIN OF SAND WHICH COUNTERACTS
THE FORCE OF GRAVITY. Elliott: SO IF THOSE TWO FORCES
ARE IN EQUILIBRIUM, THE SAND JUST HOVERS. [ LAUGHTER ] THE GAS FLOW HAS TO BE JUST
RIGHT TO ALLOW THE SAND GRAINS TO MOVE FREELY OVER EACH OTHER. IF THE GAS IS COMING OUT
TOO QUICKLY, IT WILL GIVE TOO MUCH FORCE
TO THE GRAINS OF SAND, AND THEY WILL FLY OUT
OF THE HOT TUB. TOO LITTLE GAS, AND THE SAND
WON’T REALLY MOVE AT ALL. I CAN’T GET IT OUT. WHAT’S SO WEIRD IS THAT
WHEN YOU PULL YOUR HAND UP, OR YOU GET OUT, LIKE,
IT’S COMPLETELY DRY. LIKE, THAT’S THE PART
THAT’S LIKE, “WHAT IS HAPPENING?
LIKE, THIS ISN’T QUITE RIGHT.” CUT IT. AH!
[ LAUGHTER ] THIS LOOKS LIKE A LOT OF FUN UNTIL YOU HAVE TO GET SAND
OUT OF PLACES.

65 thoughts on “A Hot Tub Filled with Liquid Sand | Outrageous Acts of Science

  1. Mark 7: 15 " Nothing outside a person can defile them by going into them. Rather, it is what comes out of a person that defiles them."

  2. I would let the children snorkel under the sand and turn off the gas entry mechanism. Thus suffocating the beautiful children.

  3. First off nice job covering something from months ago link the video anywhere so it's basically copy writ run out of ideas already

  4. This isn’t weird. It’s science because picture 2 Balls next to each other. Then gas tries to get through so the only possible logical solution for it is to squeeze it’s way through it.

  5. I feel like an evil villain could use this as a trap for a hidden lair. instead of a moat of water, a moat of activatable quicksand that's deep enough to entomb would be heroes whole

  6. 🏡✨💎💎✨💎💎✨
    💎💎💎💎💎💎💎
    💎💎💎💎💎💎💎
    ✨💎💎💎💎💎✨
    ✨✨💎💎💎✨✨
    ✨✨✨💎✨✨✨
    I can make real diamonds to all of stuff buy it now:)

  7. Everyone seems to be surprised with this but I don't get it it happens during earthquakes that's why some houses just disappeared

  8. I'M TOTALLY GOING TO SAY THIS TO MY BOYFRIEND! BABE, I SO WANT ONE! CAN YOU BUILD ME ONE, PLEASE!😍😁💖💖💖💖

  9. So basically you’re taking someone else’s video, explaining it, i’m not doing anything about it. He already explained how he did it, AND He explained the science behind it.

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