Challenge Questions Blog

Challenge Questions

Stop in and exercise your brain. Talk about this month's Challenge from Specs & Techs or similar puzzles.

So do you have a Challenge Question that could stump the community? Then submit the question with the "correct" answer and we'll post it. If it's really good, we may even roll it up to Specs & Techs. You'll be famous!

Answers to Challenge Questions appear by the last Tuesday of the month.

Previous in Blog: Tuning Fork Disagreement: Newsletter Challenge (01/02/08)   Next in Blog: Beat Frequencies: Newsletter Challenge (01/22/08)
Close
Close
Close
Page 2 of 2: « First < Prev 1 2 Last »
Rating: Comments: Nested

Soda Pop: Newsletter Challenge (01/15/08)

Posted January 13, 2008 5:01 PM

The question as it appears in the 01/15 edition of Specs & Techs from GlobalSpec:

Roger really likes soda; he drinks it constantly. Dan notices Roger tends to buy 1 liter bottles of soda, and points out he could probably save money (especially at the rate he consumes it), if he bought the 2 or 3 liter sizes instead. Roger disagrees; he says, "In larger bottles, the soda is too sweet." Is there really a difference in the taste when the soda is packaged in larger bottles, or is Roger just imagining it?

(Update: Jan 22, 8:54 AM EST) And the Answer is...

Roger may be imagining things, but this isn't one of them. The one liter bottle of pop retains it's carbonation better than the 2 or 3 liter bottles. This is because the one liter bottle reaches equilibrium more quickly than the larger bottles due to lower surface area at the soda gas interface and a lower volume of air in the bottom that needs to be brought up to pressure to reach equilibrium. The more carbonation in pop, the less sweet it tastes.

Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.
Power-User

Join Date: Jan 2007
Location: Timmins Ontario Canada
Posts: 128
Good Answers: 1
#104
In reply to #101
Find in discussion

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/24/2008 2:44 PM

Thats interesting-I had no idea that the diffusion rates were that significant. I have a cousin that home-brews very good beer. He uses champagne yeast because he can use less sugars, and it doesn't carry a strong yeast flavour to the finished product (some of his early experiments were like pouring out a slice of bread). He is very peticular, and insists on using plastic bottles for the ales, because he says that it doesn't make the beer (and us) overly gassy. Are diffusion rates proportional to the pressure? If so I might owe him an apology - I always though he was being overly finicky.

__________________
Mens Sana In Corpore Sano
Reply
Guru

Join Date: Apr 2007
Posts: 3531
Good Answers: 59
#105
In reply to #104

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/24/2008 4:11 PM

At modest pressures, diffusion rates are indeed proportional to the difference in partial pressure. With increasing pressure, the diffusion rate apparently increases considerably less rapidly than you might expect - possibly because of the limited solubility of the CO2 in the plastics matrix. You can detect this effect in the decay rate shown in this link (originally in post #73); the decay rate more-or-less saturates for CO2 pressures above about 1-bar.

(This is for blown PET bottles - not only are these bottles thin, but the diffusion rate of blown PET is about a factor 25 greater than for the usual cast plastic)

By the way, I would generally prefer to use glass and to vent the bottles when they have reached the appropriate specific gravity - that allows direct control of the final CO2 level - it also avoids any issue of oxygenation in storage, which I understand to have adverse effects on beer (though a small amount of oxygenation is definitely good for wine)

Reply
Power-User

Join Date: Jan 2007
Location: Timmins Ontario Canada
Posts: 128
Good Answers: 1
#106
In reply to #105

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/24/2008 10:41 PM

very interestig

shelf life has never been an issue with my cousins beer to date.

__________________
Mens Sana In Corpore Sano
Reply
Guru

Join Date: Apr 2007
Posts: 3531
Good Answers: 59
#107
In reply to #106

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 5:09 AM

"shelf life has never been an issue with my cousin's beer to date."

Perhaps it gets drunk(pun_intended)?

Reply
Guru
Hobbies - HAM Radio - New Member Popular Science - Weaponology - New Member United States - Member - New Member Engineering Fields - Mechanical Engineering - New Member

Join Date: Jan 2006
Location: Saint Louis, Missouri USA
Posts: 1929
Good Answers: 9
#108
In reply to #107

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 9:37 AM

"shelf life has never been an issue with my cousin's beer to date."

Perhaps it gets drunk?

Yup, nothing like getting your date drunk on beer, then holding her hair back while she worships the porcelain idol!

__________________
"What, me worry?" Alfred E. Neuman
Reply
Guru
United States - US - Statue of Liberty - New Member Hobbies - Fishing - New Member

Join Date: Nov 2007
Location: Gone to Alabama with my banjo on my knee...
Posts: 5595
Good Answers: 20
#109
In reply to #108

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 10:14 AM

Ah, how I love the weather here - it fairly RAINS puns!

__________________
Veni, vidi, video - I came, I saw, I got it on film.
Reply Off Topic (Score 5)
Power-User

Join Date: Jan 2007
Location: Timmins Ontario Canada
Posts: 128
Good Answers: 1
#110
In reply to #109

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 1:01 PM

Its funny-considering the combined IQ's, knowledge base, and experience of the participants in this blog; half the time the challenge question takes back seat to the gufaws.

__________________
Mens Sana In Corpore Sano
Reply Off Topic (Score 5)
Guru
United States - US - Statue of Liberty - New Member Hobbies - Fishing - New Member

Join Date: Nov 2007
Location: Gone to Alabama with my banjo on my knee...
Posts: 5595
Good Answers: 20
#112
In reply to #110

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 3:50 PM

If we were sitting in one room, face to face holding a design meeting, we'd all be as strait-laced as a hangin' judge. Here, you can hide behind the anonymity of your avatar and just cut loose. Dang good thing, too, I get awful tired of those meetings, because I'm usually the one that just has to crack a joke...

__________________
Veni, vidi, video - I came, I saw, I got it on film.
Reply Off Topic (Score 5)
Guru
Hobbies - HAM Radio - New Member Engineering Fields - Mechanical Engineering - New Member United States - Member - New Member

Join Date: Jun 2007
Location: Kiefer OK
Posts: 1325
Good Answers: 22
#111
In reply to #109

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 2:56 PM

Ah, how I love the weather here - it fairly RAINS puns!

Obvously, we have a lot of people here from Punnsylvannia! If you think anyone deserves punishment, you could give them a punch. But if you try that on me, I'll distract you first. How? Alaska Hawaii!

__________________
I wonder..... Would Schrödinger's cat play with a ball of string theory?
Reply Off Topic (Score 5)
Guru
United States - US - Statue of Liberty - New Member Hobbies - Fishing - New Member

Join Date: Nov 2007
Location: Gone to Alabama with my banjo on my knee...
Posts: 5595
Good Answers: 20
#113
In reply to #111

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/25/2008 3:58 PM

Well, 'pun my word! You don't think I'd favor punishment for humor do you? I might take paper and puncil and write you a note about it. I'd never punch you out though. Kind of you to demonstrate your geographical prowess, Alaska, Hawaii, Punnsylvania, and counting your own address, Oklahoma in one short post. I applaud that, and opun my bag of goodies to award you...

__________________
Veni, vidi, video - I came, I saw, I got it on film.
Reply Off Topic (Score 5)
Guru
Hobbies - HAM Radio - New Member Engineering Fields - Mechanical Engineering - New Member United States - Member - New Member

Join Date: Jun 2007
Location: Kiefer OK
Posts: 1325
Good Answers: 22
#114
In reply to #113

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/26/2008 1:34 PM

Soda thread got off topic, and a few puns snuck in. But you had to opun the door and give me the opportunity to unleash a prepunderance of groaners. Many do not appreciate plays on words, so I played the punishment angle.

I admit that I am better qualified as a punster than as a theater critic, because I am better at creating plays on words than creating words on plays.

If the goodies you offer include large amounts of my favorite soft drinks, I will say, "Tanks a lot!"

__________________
I wonder..... Would Schrödinger's cat play with a ball of string theory?
Reply Off Topic (Score 5)
Guru
United States - US - Statue of Liberty - New Member Hobbies - Fishing - New Member

Join Date: Nov 2007
Location: Gone to Alabama with my banjo on my knee...
Posts: 5595
Good Answers: 20
#115
In reply to #114

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/29/2008 8:58 AM

Sorry, the only goodie I was offering was the gold star. But if you're thirsty, have one on me...

__________________
Veni, vidi, video - I came, I saw, I got it on film.
Reply Off Topic (Score 5)
Anonymous Poster
#94

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/23/2008 10:19 AM

The way I view this whole problem is Dan shouldn't be concerned over Roger's soda budget; unless of course they are domestic partners; but let's not get off track.

Roger simply prefers the taste-effect of a 1-liter bottle.

I imagine if we collectively sum up the total amount of money wasted (as in the sum of our individual wages from reading/responding) on this silly question, we could have bought Roger enough stock options in his favorite soda company to provide him with free soda for life.

Reply
Guru
Hobbies - HAM Radio - New Member Popular Science - Weaponology - New Member United States - Member - New Member Engineering Fields - Mechanical Engineering - New Member

Join Date: Jan 2006
Location: Saint Louis, Missouri USA
Posts: 1929
Good Answers: 9
#102

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/24/2008 12:12 PM

Dude! Just buy single serving 12 oz. cans! Then recycle the aluminum for CASH! Plastic bottles can be recycled, but the value you earn (if any) hardly justifies the effort, unless you are just a "green freak" . There are lots of other great reasons to buy cans versus plastic bottles.

Another advantage of single serving aluminum cans is that they can be cooled very quickly by icing down in a tub of ice and water (add salt to get it REAL cold!) and you have no dirty glasses to clean up after if you drink straight from the can. Although I would advise washing/wiping off the top first before opening to avoid any foreign matter in your mouth that might have been deposited during handling or transportation!

Talk about maximum carbonation! HOO-CHEE, MAMA! You can be your own one-man burpfest! "R-a-a-a-a-a-alph! Bu-u-u-u-u-u-u-u-uick! O-o-o-o-o-o-o-o-o-oldsmobile!"

Then there is ever-popular SHOTGUN method of consuming the canned beverage, a party favorite . Using a sturdy pointed object (a ballpoint pen may do in a pinch), puncture a hole in the side of the can near the bottom. Place mouth over hole (or for the really daring, hold can a few inches above and away from your mouth with the hole aimed towards you), then pop the top and let 'er rip, as the tasty liquid gushes into your mouth. This may be used with other canned BEvERages as well! Caution, flow is difficult to stop once it starts and DON'T set your can down before finishing it!

Other party games/stupid human tricks involve the six-pack connector piece of plastic. Demonstrate how the relatively weak plastic can be easily pulled apart by grabbing one loop on each end and pulling until it stretches and breaks at one point. Then invite the strongest and dumbest, or drunkest , party guest to pull another plastic piece apart, but this time fold the loops together, since he is so strong, and observe with HIGH-larity how the oaf pulls until his fingers throb and almost bleed, then grimaces with pain.

Oh.....pardon me....I just had a flashback to my lost and wanton youth! <grin>

We now return you to your original program.

__________________
"What, me worry?" Alfred E. Neuman
Reply Off Topic (Score 5)
Guru
United States - US - Statue of Liberty - New Member Hobbies - Fishing - New Member

Join Date: Nov 2007
Location: Gone to Alabama with my banjo on my knee...
Posts: 5595
Good Answers: 20
#103
In reply to #102

Re: Soda Pop: Newsletter Challenge (01/15/08)

01/24/2008 1:52 PM

YEEEEE-haw! You GO dude! I still think my original answer is closer to the truth than all of this chemistry and physics combined...check it out!

__________________
Veni, vidi, video - I came, I saw, I got it on film.
Reply Off Topic (Score 5)
Reply to Blog Entry Page 2 of 2: « First < Prev 1 2 Last »
Copy to Clipboard

Users who posted comments:

3Doug (3); Anonymous Hero (1); Anonymous Poster (25); aurizon (8); Bart@ (1); Bayes (1); ca1ic0cat (1); Cardio07 (1); Circuit Breaker (1); cuznmonkey (16); DAG (1); double_j_b (1); EnviroMan (12); Kris (2); ozzb (1); Physicist? (25); Procrastin (1); RickLee (6); SmithsEng (1); spider (1); STL Engineer (6)

Previous in Blog: Tuning Fork Disagreement: Newsletter Challenge (01/02/08)   Next in Blog: Beat Frequencies: Newsletter Challenge (01/22/08)

Advertisement