Search found 16 matches

by Rachie
Tue Jul 05, 2016 10:39 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1702: "Home Itch Remedies"
Replies: 33
Views: 7116

Re: 1702: "Home Itch Remedies"

I've discovered vibrations cause similar relief. It triggers the same nerves as scratching, penetrating deep through the skin, without causing damage. It can be very cathartic, if not pleasant.
by Rachie
Mon Nov 16, 2015 7:08 am UTC
Forum: Mathematics
Topic: Traffic light puzzle
Replies: 8
Views: 2551

Re: Traffic light puzzle

I don't think your answer is quite right. I did a bit of experimenting, and came up with nearly the opposite. Approaching the light at full speed, it turns red. Instead of coasting, I immediately brake to reduce my speed to half. Just as I reach the light, it turns green, allowing me to continue wit...
by Rachie
Wed Nov 11, 2015 3:52 am UTC
Forum: Mathematics
Topic: Traffic light puzzle
Replies: 8
Views: 2551

Traffic light puzzle

I came up with a little puzzle during my commute. I drive on a highway with poorly timed traffic lights, during off-peak hours. In order to slightly improve fuel efficiency (but mainly to combat my boredom), I do my best to coast before red lights, ideally letting them turn green before coming to a ...
by Rachie
Wed Jan 14, 2015 5:09 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 1473: "Location Sharing"
Replies: 67
Views: 18860

Re: 1473: "Location Sharing"

I had a completely different interpretation of the comic. I saw the first panel as a nosy program trying to spy on the user's location, and getting denied. The program then tries to skirt around the answer by asking for momentum instead. Since momentum can be used to derive location as a form of ine...
by Rachie
Tue Mar 25, 2014 4:56 pm UTC
Forum: What If?
Topic: What-If 0089: "Tungsten Countertop"
Replies: 77
Views: 24207

Re: What-If 0089: "Tungsten Countertop"

The title text is missing for the images. The story about the soldier drinking wine doesn't make much sense. Rifle barrels are typically exposed to copper and lead, not tungsten. Yes, there are tungsten rounds, but they're fully jacketed, less they scrape away at the softer steel of the barrel with ...
by Rachie
Thu Jun 27, 2013 1:19 am UTC
Forum: What If?
Topic: What-If 0050: "Extreme Boating"
Replies: 110
Views: 30993

Re: What-If 0050: "Extreme Boating"

With the proper design, the Leidenfrost effect could be exploited for both cooling and propulsion. As long as the boat has a supply of liquid water to flash boil on the tungsten, the hull will be shielded from the intense temperature. The steam could then be partially ducted to provide horizontal th...
by Rachie
Mon Jun 24, 2013 6:28 am UTC
Forum: What If?
Topic: What-If 0050: "Extreme Boating"
Replies: 110
Views: 30993

Re: What-If 0050: "Extreme Boating"

It may be forty times rarer than gold, but it's currently about 75% of the price. With the right grants, an experimenter should have no trouble buying enough to fill a small crucible. Quite a bit cheaper than a lake of liquid helium, anyway.
by Rachie
Sun Jun 23, 2013 6:32 pm UTC
Forum: What If?
Topic: What-If 0050: "Extreme Boating"
Replies: 110
Views: 30993

Re: What-If 0050: "Extreme Boating"

So do it above the lake of liquid helium. Not much combustion will be going on there. There's still the slight problem of tungsten carbide formation, but at least it won't burn. How about a two layer crucible? Start with solid carbon, and fill it with iridium. Heat until the iridium melts, then add ...
by Rachie
Sun Jun 23, 2013 5:03 am UTC
Forum: What If?
Topic: What-If 0050: "Extreme Boating"
Replies: 110
Views: 30993

Re: What-If 0050: "Extreme Boating"

I'm surprised no one else noticed the glaring error: "Tungsten has the highest melting point of any element." Granted carbon sublimes instead of melts at human safe pressures, but it's still solid to 3627 °C at standard pressure. At higher pressure, it melts around 4300 °C. Both are well a...
by Rachie
Tue Nov 22, 2011 8:53 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0980: "Money"
Replies: 375
Views: 108005

Re: 0980: "Money"

Typo:
"Typing FUNDS" should be simply "FUND", assuming it refers to the SimCity 2000 code to issue a large bond.
by Rachie
Mon Sep 26, 2011 7:05 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0956: "Sharing"
Replies: 82
Views: 26780

Re: 0956: "Sharing"

Obligatory:
The Giving Tree read aloud

I can't find an ebook version yet.
by Rachie
Wed Oct 06, 2010 7:39 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0802: "Online Communities 2"
Replies: 292
Views: 75100

Re: "Online Communities 2" Discussion (#802)

Gazebo wrote:Why is there not an area for porn? Seems a bit of an oversight.

Clearly, porn is its own continent. I for one can't wait to see the map.
by Rachie
Sat Aug 14, 2010 6:59 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0779: "Anxiety"
Replies: 113
Views: 68396

Re: "Anxiety" discussion (#779)

As a trans person, these machines are terrifying. I look like a guy, but not having an attached appendage there, I get outed when I step through those things. People have given me grief about it. I was lucky; they just made fun of me. A lot of trans folk have it way worse. Your crotch doesn't get t...
by Rachie
Mon Jan 26, 2009 10:25 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0535: "It Might be Cool"
Replies: 147
Views: 29361

Re: "It Might be Cool" discussion

Maybe the fact that there are people out there who have been entertaining this thought for years. Like me. Must have been before the onset of puberty that it crossed my mind; the most obvious contra to me has always been going through labour. I don't think I am transsexual (I'm 20, I should know by...
by Rachie
Mon Jan 26, 2009 10:12 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0535: "It Might be Cool"
Replies: 147
Views: 29361

Re: "It Might be Cool" discussion

Yep, I'm a transwoman in all her depressing glory. Being a girl is great, but being trans really sucks.
by Rachie
Mon Jan 26, 2009 9:33 am UTC
Forum: Individual XKCD Comic Threads
Topic: 0535: "It Might be Cool"
Replies: 147
Views: 29361

Re: "It Might be Cool" discussion

Speaking as a former male, I definitely understand how women can be considered the weaker sex. My upper body strength has decreased markedly, and in stressful situations I now burst into uncontrollable tears. Fortunately my engineering skills are as sharp as ever. Though I can't speak of menstruatio...

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