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More ways to get Braingle...

Ice Boat

Science brain teasers require understanding of the physical or biological world and the laws that govern it.


Puzzle ID:#8004
Fun:*** (2.86)
Difficulty:*** (2.89)
Submitted By:im_para_noid*****




On a hot summer day by a lake you are determined to build a boat made of ice, using a refrigeration unit and a large mold in which you can pour water. Nearby you notice an Egyptian mummy resting on a pile of wood pulp. What is the best strategy for building an ice boat that will not melt before you sail it across the lake?

What Next?


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Oct 16, 2002

That's impressive! And thanks for properly calling Canadian summers hot!
Oct 16, 2002

good 1
Oct 18, 2002

I agree canadian summers are properly recognized, finally!;)
Oct 24, 2002

I like cheese to, but very great teaser
Nov 22, 2002

Very informative and interesting thank you
Nov 22, 2002

great work
Nov 22, 2002

Very interesting but not easy to get unless you are an expert on 19th Century engineering. Good fun though, like the red egyptian herring!
(user deleted)
Nov 22, 2002

That's cool! It's amazing that a substance that simple can be so strong. Thanks for the info.
Dec 15, 2002

very clever, but did you make it up or get it from some where like the internet?
Dec 17, 2002

Good job
Jan 14, 2003

HOT Canadian summers??????? AAAAAAhhhhhhhhhhhhhhhhaaaaaaaaahhhhhhhhhhhhhaaaaaaaaaaaaaahhhhhhhhhhhhaaaaaaaaaa, ROTLMAO. What does Canada know of hot summers. Listen fella's 3 days when temperatures reach the 80's does not a summer make.
Jan 15, 2003

Rayn, you are just showing your ignorance.
Feb 04, 2003

Canadian summers are hot? I'd trade a Canadian summer for an aussie one any day, the way I feel at the moment. It's gotten to forty this summer (that's in celcius, it would be about 104 degrees fahrenheit). So bring on the Canadian summers! Oh, and good teaser.
Feb 28, 2003

Is that Pykrete for real or did you make it up? It's not in my encyclopaedia!
Nov 22, 2003

That was interesting, and thanks for bringing Pykrete to our attention; I had never heard about it before. However, I did some research and stumbling on this link, which seems to present a well balanced view on the substance, and may explain why it is not that well known, nor is it being used as you would expect given its supposed 'super properties':
Nov 22, 2003

Real Cool! Learnt something new.
Dec 24, 2003

I'm impressed.
Nov 22, 2004

or ya could just wait for winter, if the lake freezes over...
Nov 22, 2004

Hmm. I guess no one told that to the makers of the Titanic! (Probably would've been a really good idea...)

I don't get how some teasers with relatively reasonably-known facts can be rejected as "too uncommon knowledge," while things like this (which no one knows!) aren't. I personally think this is a good teaser (not because the teaser is fun.. lol, but because the information is really cool). I think both should be acceptable ;P
Nov 22, 2004

Look up Pykrete on
Nov 22, 2004

omg i LOVE wikipedia... its soo cool =D
Nov 22, 2004

That's pretty neat. I knew it had something to do with the wood pulp....
Nov 22, 2004

Supplies: Refrigeration unit, water, and wood pulp

Process: Freeze water and wood pulp

though it is a minor fault...wouldnt you have to have a freezer unit instead of a refrigeration unit? A refrigerator only cools things..not freezes

other than that...great teaser
Nov 23, 2004

Well you learn something new everyday
(user deleted)
Nov 23, 2004

i actually got that you freeze the wood pulp with the water, but didnt know that other stuff good teaser
Sep 09, 2005

Nov 22, 2005

Hey Celenbe... I bet you learned interesting and informative scientific facts from this teaser. Knowledge is WISDOM, and someday you may share your knowledge with others. Thanks for the grat teaser.
Nov 22, 2005

great sp.
Nov 22, 2005

Would have never guessed that in a million years.
Nov 22, 2005

this one should have been a trick too lol
Nov 22, 2005

Wow, I can't believe I actually got that right! I sort of just worked it out with my weird logic.
Nov 22, 2005

Nov 22, 2005

Wow, I can't believe I got this right! It was one of those teasers I worked out with my weird logic.
Nov 22, 2005

Sorry, I must not tell a Lie: This Teaser was good, but I still donn't understand the wood pulp. If the ice melts would the wood pulp just scatter in the water? NO, of course not, Iam missing the Glue, or Nails, or you're just lying to the Braingle Community. Boring, Boring.
Nov 22, 2005

Like all trivia - you either know the fact or you don't. I didn't, and there was no way to figure it out without doing internet searches.....
Nov 22, 2005

This was very interesting
Nov 22, 2005

Fascinating. I had actually guessed that you threw the pulp atop the ice, as I remember that's how it was done in Little House on the Prairie books when i was a kid. That's how they rigged up refrigeration in the warmer months...

they dug out a cellar, took blocks of ice from the winter, covered them in sawdust or woodpulp, and that's what preserved their perishables in summer.

Informative, and thanks also for the link. Woohoo.
Nov 22, 2005

Boy oh boy, Mr. Noid, you sure are good at making people think!! It's great to learn neat stuff like that!!!
Excellent job!!!
Nov 22, 2005

That was fun. Got me pretty go, first thing I thought was the mummy! I think those of you that didn't like it are just mad that you didn't get it.
Nov 22, 2005

I actually got it even though I usually miss the Science teasers
Nov 22, 2005

Yep, good teaser! I am using the wood pulp...that was my guess! I liked it and I'm always up for learning something new every day!! Although, I have heard of Pykrete before! Good one!
Nov 22, 2005

I guessed at freezing the wood pulp into the water but didn't know what the mixture was called. Thanks for the lesson!
Nov 22, 2005

Cool!! I want to go out and build one right now !!! Listen, Y'all don't know "hot" until you all come to Texas!! its November and I am still wearing shorts and a t-shirt!!! We BBQ for Christmas!!! Other than that I enjoyed it!!!! Thanks you da bomb!!! Snaps for you!!! (snap snap)
Nov 22, 2005

VERY INTERESTING!!! Who would have thought that frozen wet wood pulp would have those kind of properties!!! Amazingly though, I guessed right! Somehow the mummy just didn't fit logically. Good one!!!
Nov 22, 2005

Who knew? Thanks for that bit o' trivia.
Nov 22, 2005

I thought this one was very informative. I like learning new things everyday. This one is the first to go on the fav list! keep stuff like this coming!
Nov 22, 2005

Hard and easy at the same time.

Hard if you consider to get it right you had to know the specific info regarding pyecrete. Sorta easy if all you had to do is guess the right answer. Process - first dismissing the mummy as an obvious red herring and then thinking about what one would do with the remaining element the saw dust. that leads to obvious consideration of mixing it with water but had to think about how to turn that soup hard .........duh ..... freeze it!

All a bit too educational for a Braingle LOL
Nov 22, 2005

wow talk about wierd facts. thats awesome! this is going on my favorites list just because its so uncommon. i never knew anything about pyecrete. do you think they could do somthing similar w/ concrete?
Nov 22, 2005

What a wonderful way to start my day!!! I got it but didn't know about the big boat that was built!! Thank you
Nov 22, 2005

i like it d i dont really bother reading long things but i had to read it coz i really wanted to know!
Nov 22, 2005

I actually got this one. !i just noticed the wood pulp and thought why not mix it in with the water? that must do something !
It wasnt all a guess though....
Nov 22, 2005

and how does anyone get hot Canadian summers from this teaser??????i want to know!!!!!!
Nov 22, 2005

I guess I used to think this site was fun and challenging. No offense to those of you who try, but these teasers get worse least someone is enjoying it. I am officially taking Briangle off of my homepage.
Nov 22, 2005

amazing, thanks for the interesting info. keep it up! I like to learn
Nov 22, 2005

Is Canada hot in summer? I can't remember because I spent my entire time there swating the biggest mosquitos on the face of the planet.
Yeah it is hot there.

Great teaser.
Nov 22, 2005

Hey, I think this is a great teaser! I especially like the whole "this just HAPPENS to be here" theme! Lol, keep it up, it really was good!
Nov 22, 2005

I knew what to do, but I never knew the proper name or even that there was a proper name for the frozen mixture of water and pulp. And those facts you threw in are pretty wild, albeit somewhat difficult to believe.

For a more practical application of similar principles, newspaper is great to wrap frozen food in to keep it from thawing for a few hours like when traveling
Nov 22, 2005

Very interesting. I had no clue what the solution was, knowing very little of science, but I found this interesting none-the-less!
Nov 22, 2005

Thank you ~ ~ ~ very interesting!
Nov 22, 2005

god youre so stupid
Nov 22, 2005

I remember seeing this on the History channel. During the latter part of WWII the British wanted to build and aircraft carrier out of this stuff. During a meeting with American Admirals a british officer took out his pistol and fired at a block of it. The bullet bounced off and in the American Admirals leg. Istill didn't figure it out.
Nov 22, 2005

Cool!!! Very informative. I've never in all my life heard of "pykrete." It was interesting tho.

(Hot summers in CANADA??! )
Nov 22, 2005

Ok, no one would actually know that exept you! That was dumb!
Nov 22, 2005

Interesting I guess????? Way out of my LEAGUE A scientist I am NOT Any way,Who in his RIGHT mind would want a boat made out of ICE????????
Nov 22, 2005

wHO knew? That's very interesting! I thought of mixing the pulp in first. Then I thought that that wouldn't doo anything, but putting the wood pulp in the mold as a coating, then pour the water in an freeze it; I figured that would make the wood pulp freeze on the outside, acting as an insulation! Then, because there's a mummy you might as well use it, you unwrap the mummy *risking bringing an ancient curse for anyone who disturbs the corpse* and wrap the material around the outside of the iceboat, thereby holding the woodpulp on and further strengthening and insulating the ice! In any case, I think that even if you know about the Pykrete you may as well use the mummy wrap to make it stronger! Thanks, this was fun!
Nov 22, 2005

well... i thought it was hard..... but... i never thought about that kinda thing o well.... wen m i ever gonna need it!?!?
Nov 22, 2005

Being technically minded as I sometimes can be , I immediatley noticed the "...not melt *before* you sail..." part. Of course, if the ice has to remain solid *before* the sail arcoss the lake, once the ice has been frozen, the task is done once you place the ice in the lake (and it melts).
Nov 22, 2005

Interesting. I figured using the wood pulp with the mold and freezing it.. however, I did not know of the existence of Pykrete. Kudos.
Nov 22, 2005

sorry i didn't like it i thought it was boring and it's like who would know that anyway?!
Nov 22, 2005

boy...looks like someone pulled this one out of the archives. There must be more recent teasers than this that are worthy of being the daily teaser. This one just isn't my cup of offense!
Nov 22, 2005

I was just reading the comments and noticed all this talk about Canadian summers, then re-read the teaser: there's NOTHING about being in Canada, and the person who wrote the teaser lives in Wisconsin!!!! It's like Whisper Down the Lane! And then, everyone is like: YOU think YOUR summers are HOT! You should feel OUR hot summers! Hilarious!!!
Nov 22, 2005

Canada is mentioned in the answer. I went once in Aug. and it was around 60 degrees, so I really can't agree with the hot summer thing.
Nov 22, 2005

Yeah. summer;s get pretty hot in california too. a few years ago, it was like, 112 for like 2 weeks stright.
Nov 22, 2005

Great teaser. Idda never guessed.
Nov 22, 2005

And what is wrong with Wisconsin???
Nov 23, 2005

Nov 23, 2005

this brain teaser is STUPID!
Nov 23, 2005

I didnt like this one at all.
Nov 23, 2005

Hey! I saw the same Discovery Channel special! You built more suspense though
Nov 23, 2005

nice but so easy for me
Nov 23, 2005

GOOD 1!!
Nov 23, 2005

That is the stupidest teaser ive ever seen. Even i can make a better one than that i just don't want to take the time.This was boring!!!!!!
Nov 23, 2005

considering the category, i dont know what some people's problem is,,,maybe they should stick with tic tac toe, and leave the trivia matters for others to enjoy or not.
not my type of teaser, but i found it interesting and informative and fun
Nov 23, 2005

Oh yeah, Canada IS in the answer, wadda ya know????? Who said there was anything WRONG with Wisconsin? Gee whiz, lol. I wish some of you would just not say anything instead of saying it's stupid, dumb, boring, etc. Either say why you think that, or don't say that, or write your own so you can see how hard it is. Have just a LITTLE consideration for the author's feelings! These are by members!
Nov 27, 2005

BLah that waz weird!!!!!! Made no sense 2 me!!!!
Feb 26, 2006

oh yeah, you think Canadian summers are hot???

wait until you come to Vermont!!!! Our summers are waaaaay hotter than yours.... (hint of sarcasm...)

Stop competing over whose summers are hotter!!! I get it!! Canada is cold...
Mar 15, 2006

i saw something about this within the past month or so on discovery or the history channel . whichever of the nerd networks i always watch !
Jun 22, 2006

"Canadian" and "hot summer" shouldn't be allowed in the same sentence!
Dec 02, 2006

Please DO NOT "forget about the mummy." If you're going to "sail" across the lake, the windings, bones and pine tars will be needed to build the sail.
A fact I don't see is the buoyancy of pykrete. It must be less than that of ice because the pulp must lose its buoyancy before it will mix with water. That suggests pykrete will float deeper, making it less manuverable and slower. Slower, in turn, means more time to melt.
I like the trivia, even though it may be less than accurate.
More outside the box - Make a propulsion device (sling from mummy bandages, cannon powered by refrigerant, etc.) and a tiny little boat. Then, catapult or "sail it across the lake." The question doesn't lock you into sailing in the boat! And, considering the looney expenses of pykrete related tests, this may be the best way.
Jan 24, 2007

Why would someone just leave a mummy near a lake, much less on a pile of wood?
Dec 26, 2009

wow how interesting
somewhat random, but cool b^^d
Feb 14, 2010

Feb 14, 2010

It would not be an ice boat, more like a Wet Wood and cold float.

Good Teaser, I guess.
Feb 14, 2010

Really interesting teaser. Worthy of its TOTD spot. It's good to have a think and then learn something.
Feb 14, 2010

Well written!
Feb 14, 2010

Feb 14, 2010

Nicely written, informative and educational. Thanks for posting.
Feb 14, 2010

Good one.
Feb 14, 2010

I've read about pykrete before so I was lucky to come up with the answer.
Feb 14, 2010

I think that I learn something new, like every day.
Feb 14, 2010

Look up the pykrete article in Wikipedia where it is reported a small-scale boat was made of this stuff and only lasted 23 minutes in the water before it began springing leaks. (Maybe it could get across a very small lake.) This is a myth, as the judges should have known, and substantiated proof should have been cited by the maker.
Feb 14, 2010

Why forget about the mummy? Mummies are cool!
(user deleted)
Feb 14, 2010

Does no one hear watch mythbusters? Just google "mythbusters ice boat". They showed it's possible to build a small boat, but impractical as it melts quickly. And a 60 ft pykrete boat was never built, do your research.
Feb 14, 2010

Feb 14, 2010

I knew the answer, but I don't know how I knew. I must have heard about pycrete before and it was lodged in my mind waiting to come out.
Feb 14, 2010

May 16, 2010

They made a boat out of it in Mythbusters
Feb 24, 2011

That is very interesting! Thanks for the information about it! I enjoyed learning of it.
Apr 26, 2014

Yessssssssssssss !!!!

First to comment in 2014 AND ....

I challenge everyone to c'mon in until we get 10 more comments.

Then I'll come in again.

Really, folks, Braingle will "die" if we don't get some conversations going in the comment sections.

I and my Dad have been here for almost 15 years and can tell you that's what makes Braingle thrive.

It's worth fighting for.

Please do it.

BB02 - OK ... who's next ?
Apr 26, 2014

The information was most interesting and informative, but as for a teaser how is the average person on this sight supposed to know all this, and be able to solve it? A few did who have read something at sometime, but to me it is not a good teaser.
Apr 26, 2014

Thanks, Babe.

That's comment #1.

Next - ????

Apr 26, 2014

You don't have to know ANYTHING about mummies, wood pulp, or pykrete to solve this puzzle.

#1special Braingler (wayyyyy above) got it:

Simply wait until winter.

Apr 26, 2014

BadBunnee- Give us a break. We are tired of all your multiple remarks.
Apr 26, 2014

Thanks, cutebug .......

At least my tactic is working.

You are #2 in the comment column for this teaser for 2014.

Who's next?

Apr 26, 2014

Oh I LOVE the comments on this site! What a wide range of people and their ideas! This wasn't my favorite puzzle but I did learn a lot. Now back to my outside life -I'll return later to see any new comments that are posted!
Apr 26, 2014

Yeaaaaaa !!!! COMMENTS !!!
GayleWolf is # 3 !!!!!

Anybody wanna wager that we'll get seven more ??

I'll bet 50 of my Braingle points against 50 of anybody elses that we DO !!!

Apr 26, 2014

No bet, BB. Loved this teaser, but that's because I figured if they mentioned the wood pulp in the teaser it must be important. Then I remembered how strong pyrete is and the rest was easy.
Apr 26, 2014

Do I lose points for spelling ? Sorry.
Apr 26, 2014

Wowsie Wowsie ......

A-Sis is #4 and that leaves only six more !!!!!!!!!!!!!

And ... no cost for missspelt stuff.

AND ... (We really can't wager our points 'cause the Eds told me years ago that we don't actually OWN our points ... they are the property of the ruling class here) .... so ...

HEY ... we could do BraingleBucs (a-la BitCoins) !!!

Anybody up for that ????

Ok ... (anyway) ... who's next for #5 and that'll put us half-way there !!

Apr 26, 2014

Well, BB - you crack me up! And how about a reply to my last message I sent you here recently. Did I give you too much information? I guess I DID get carried away!
Good to see you Auntie Sis. HUG!!
Apr 26, 2014

BooHoo .... no hug for BB ????

Patience GW .... (I'm a slow reader)

Apr 26, 2014

HUG for someone - and you know who you are.

Sorry, readers - I'm getting off of our true purpose here - to comment on the quiz!!

It's a beautiful spring day here in the US - hope you all spend it with someone you love!
Apr 26, 2014

I knew about Pykrete but I'd have brought the Mummy on the boat as I was always taught, "Never cross without holding on to Mummy."
Apr 26, 2014

Hey, JD - hilarious !!!

And a good addition to the comments.

That makes you ... what .... # 5?

We might make 10 by midnight.


Apr 26, 2014

Wellll ..... we didn't make our goal of 10 new 2014 comments in one day on this TOTD ......

But that's OK. We got five and that's a lot better then none.

Besides, my credo is:

"Shoot for the stars and you just might make it to the moon !"

We'll do better next time.

See ya at the next TOTD.

Apr 28, 2014

Dang it! I got another one wrong.

I figured that since there was an Egyptian mummy that there was probably a pyramid nearby. My solution was to freeze the ice boat and place it inside a pyramid. Pyramids are known to magically know what to do to objects placed inside them. Sharpen razor blades. Keep fruit from rotting. Etc...
Kinda like how a Thermos bottle automatically knows when you want it to keep something hot or cold.

BTW: I knew the real answer.
Apr 28, 2014

Hey ....

Did anyone think about freezing the mummy?

Since it was already "dried" ...

.. then you would have a .....




(wait for it)

.... FREEZE-DRIED mummy !!!!

yoik, yoik, yoik
Apr 26, 2017

Looked it up. It is a real deal
Thanks for an interesting post pal!!🤔

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