## Search found 46 matches

Mon Feb 23, 2015 9:07 am UTC
Forum: What If?
Topic: What-If 0130: "Snow Removal"
Replies: 51
Views: 22163

### Re: What-If 0130: "Snow Removal"

How much anti-water would I have to sprinkle on snow to create enough heat to melt all of it? Assuming you just want to melt the snow, the enthalpy of fusion for water is 333,550 J/kg dividing this by c 2 , and dividing by two (equal amounts of matter and anti matter are annihilated) you would need...
Fri Feb 20, 2015 7:37 am UTC
Forum: What If?
Topic: What-If 0130: "Snow Removal"
Replies: 51
Views: 22163

### What-If 0130: "Snow Removal"

Snow Removal Well that is certainly quite a lot of snow! At least they aren't getting earthquakes as well. During 2011, Christchurch, New Zealand had three earthquakes above magnitude 6, and two unusually heavy snows (for Christchurch)! Here is a 1m cube of snow I made after the first snow, with ou...
Thu Jul 11, 2013 3:25 am UTC
Forum: What If?
Topic: What-If 0053: "Drain the Oceans"
Replies: 121
Views: 80440

### Re: What-If 0053: "Drain the Oceans"

Yay, New Zealand was mentioned! :mrgreen: on a slightly more serious note, I think some parts of the ocean that would be separated by ridges would end up emptying more than expected due to erosion. Once the sea level gets low enough, there will only be a few places low enough for the water to flow t...
Sun Jul 07, 2013 10:47 pm UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

A random thought about the rising tide/sea levels, it is obviously not tides if it is still rising after about a day, so it could actually be a large lake. If they are beside a large lake, the rising sea could just be a flood caused by heavy rain in a different place. As I have stated before, due to...
Mon Jul 01, 2013 10:41 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

It is possible to view the night sky from Mars in Stellarium, the only problem is the time is still Earth hours/days/year etc, which makes searching year to year REALLY hard! The positions of Venus and Jupiter are almost too perfect for it to be anything else though. The final confirmation will be t...
Sun Jun 30, 2013 11:01 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Night will be about 12 hours 40 minutes long, so at 5 minutes per frame, the night should be 152 frames long. If we are currently 75 frames in, then there should be 77 frames left. almost exactly half way! day length calculator ,I selected a location between 39 and 40 degrees north, and set the date...
Sun Jun 30, 2013 5:52 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

moody7277 wrote:@ MatttheTubaGuy:
My jaw hitta da floor after seeing the composite image you stitched. Truly awesome.
.

Thank NoMouse for the stitching they did all the work.
I just drew blue lines all over it!
Sun Jun 30, 2013 12:35 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Stitching time! http://www.sky-blog.net/clothes/Kak-vyshit-fotografiyu-krestom/1.jpg np2394 - np2443. I decided to stitch stick with spherical projection as it looks more regular and makes more sense: http://forums.xkcd.com/download/file.php?id=37320&mode=view 2394-2443_stitch_sphere.png Nice j...
Sat Jun 29, 2013 6:12 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Well now that we know the exact date, using the rate of precession (1 full circle in 25,772 years), it is possible to work out how much the seasons have rotated. by my calculations, it is roughly equivalent to 9th October, so mid Autumn in the northern hemisphere. One possibility for determining the...
Sat Jun 29, 2013 4:58 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

I think that's Jupiter; its position is very close to what Stellarium predicts for 13291/04/14. Darn, was about to say the same thing! Definitely Jupiter, and the date is around the 14th or 15th of April in 13291 Now the question is: where? Since the stars seem to be incredibly accurate, I would as...
Sat Jun 29, 2013 2:59 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

New constellation map:

well no Mars, so my 13996 date is obviously wrong.
Fri Jun 28, 2013 8:05 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Also here is 2407 with constellations marked:
Fri Jun 28, 2013 7:48 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Well I have dome some more calculating and come up with 23/4/13996 The good thing is that this can be confirmed in a few more newpix when Mars should appear. :D The reason is Venus and the Sun are a certain distance apart in the sky AND in that particular location approximately every 8 years. It is ...
Fri Jun 28, 2013 6:02 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Well I did some calculations on two stars that have moved quite a bit. https://imageshack.us/a/img841/1139/xpwt.jpg η Ser and ε Sco , the first one, I marked twice, not realising it was a star that had moved. Using their proper motion, and their approximate distance in the sky (measured using Stell...
Fri Jun 28, 2013 4:23 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

I just realised something. Stellarium has the proper motion data, so if you put in a year around 15500, then the stars will move to the right place!
Now to work out exactly when (and where!)
Fri Jun 28, 2013 3:41 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Well I did some calculations on two stars that have moved quite a bit. https://imageshack.us/a/img841/1139/xpwt.jpg η Ser and ε Sco , the first one, I marked twice, not realising it was a star that had moved. Using their proper motion, and their approximate distance in the sky (measured using Stella...
Fri Jun 28, 2013 2:16 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

more in depth analysis comparison with Stellarium:

Red = blank space where there should be a star
Green = new star (or possibly a planet)
Yellow = stars that have moved
Blue = constellations.
Fri Jun 28, 2013 12:13 am UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Just a random thought, if Randall drew the star super accurate, then I am thinking this may be some time in the future. My reasoning: where the hell is Antares?! https://imageshack.us/a/img708/7194/fxau.jpg Eta Scorpii is another star that seems to have disappeared. also, several other stars seem to...
Thu Jun 27, 2013 11:30 pm UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

MattTheTubaGuy wrote:Just a random thought, if it lasts long enough that night comes, I wonder if it will be possible to determine the Latitude, and possible locations (a beach facing a certain direction on the edge of a body of water)

And nearly 3 months later, looks like I was right!
Tue May 21, 2013 10:10 am UTC
Topic: 1214: "Geoguessr"
Replies: 102
Views: 34252

### Re: 1214: "Geoguessr"

From the source code: calculatePoints: function (errorDistance) { //Points is calculated using //2100 * ((1 / (1 + e ^ (-4 * x + 5, 2))) + (1 / e ^ (-8 * x + 17, 5)) + (1 / e ^ (-30 * x + 61, 2))) //where x is (circumference - errordistance in european miles (10km))/1000 var x = (this.earthHalfCirc...
Mon May 20, 2013 9:07 pm UTC
Topic: 1214: "Geoguessr"
Replies: 102
Views: 34252

### Re: 1214: "Geoguessr"

Well I spent way too much time playing this last night! I can fairly consistently get around 9000 points, and my highest was just under 16000. Most of last night was spent trying to figure out what the hell the scoring system was though! my resulting graph: https://imageshack.us/scaled/large/801/map...
Thu Mar 28, 2013 12:02 pm UTC
Topic: 1190: "Time"
Replies: 107484
Views: 53327537

### Re: 1190: "Time"

Just a random thought, if it lasts long enough that night comes, I wonder if it will be possible to determine the Latitude, and possible locations (a beach facing a certain direction on the edge of a body of water)
Mon Feb 06, 2012 8:00 am UTC
Topic: 1013: "Wake Up Sheeple"
Replies: 165
Views: 39187

### Re: 1013: "Wake Up Sheeple"

jalohones wrote:
orangustang wrote:This should be a movie.

Something like it already is: http://en.wikipedia.org/wiki/Black_Sheep_%282007_film%29

Knew someone would post that!
trailer
Great movie, quite weird though!
Wed Aug 24, 2011 4:04 am UTC
Topic: 0723: "Seismic Waves"
Replies: 94
Views: 27520

### Re: 0723: "Seismic Waves"

If you are in a REAL earthquake, trust me, you will NOT be tweeting anything!
On a more serious note, I hope everyone over there is ok. I know how you feel, I have experienced literally thousands of quakes in the last year, and they are not nice!
Wed Dec 22, 2010 10:31 am UTC
Topic: 0547: "Simple"
Replies: 121
Views: 23879

### Re: 0547: "Simple"

looking at random comics, and came across this one. simple wikipedia is almost too simple sometimes! from article about New Zealand : New Zealand is not part of Australia :mrgreen: I don't think it would be too hard to write in simple english, since I write fairly simply a lot of the time anyway. on...
Sat Jul 31, 2010 10:24 am UTC
Forum: Forum Games
Topic: Maximize the post:views ratio! (if you look, you must post)
Replies: 36982
Views: 2501230

### Re: Maximize the post:views ratio! (if you look, you must p

random post
Sat Jul 31, 2010 10:12 am UTC
Forum: Logic Puzzles
Topic: A very interesting Mathematical Paradox
Replies: 387
Views: 158062

### Re: A very interesting Mathematical Paradox

here's a thought, 1 = 0.111... in binary, or in general 1 = 0.nnn... in base n+1
Sat Jul 31, 2010 8:38 am UTC
Forum: Hardware
Topic: Looking to build a laptop for 3d modelling.
Replies: 6
Views: 1595

### Re: Looking to build a laptop for 3d modelling.

I use my laptop for rendering quite a lot using Maya, and apart from the couple of times it wasn't plugged in properly, it has rendered fine. here and here are the things I have been rendering (skyscrapers) I do seem to run out of RAM quite quickly though. I would like to get a decent desktop someti...
Fri Jul 30, 2010 9:31 am UTC
Topic: 0773: "University Website"
Replies: 177
Views: 40424

### Re: "University Website" discussion (#773)

actually the UC website isn't too bad. (University of Canterbury in New Zealand, not University of California) there is the address and phone numbers on the bottom of the main page, there is a map that is quite good that takes two clicks to get to from the main page. key dates - 3 clicks, even thoug...
Thu Jul 29, 2010 11:15 am UTC
Forum: Science
Topic: Laser to the moon
Replies: 20
Views: 3302

### Re: Laser to the moon

I wonder if it would be easier to build some very big mirrors, and focus sunlight on the moon, like burning stuff with a magnifying glass
Fri Jul 09, 2010 10:54 am UTC
Forum: Science
Topic: salty water electrolysis.
Replies: 10
Views: 3424

### Re: salty water electrolysis.

I have left it sitting for a while now, and I also put a small amount of each solution into little aluminium pie things, which seem to be dissolving a little with the orange solution, and the orange solution itself has a blue-green layer on top. the blue solution is turning brown, and the brown solu...
Fri Jul 09, 2010 10:42 am UTC
Forum: Science
Topic: Magnetic Water Purification?
Replies: 15
Views: 4235

### Re: Magnetic Water Purification?

actually, wouldn't pumping water through a magnetic field do something to the ions anyway, because a changing/moving magnetic field generates a electric field. I'm not sure what could be used to actually remove the ions though. because water is diamagnetic, the magnetic field would affect the water ...
Thu Jul 01, 2010 4:03 am UTC
Forum: Science
Topic: Astronomy Question: Taking pictures of planets
Replies: 31
Views: 4468

### Re: Astronomy Question: Taking pictures of planets

I don't think any mirrors in the biggest telescopes these days are one piece. the biggest single piece mirror is 8.4m, which is still quite big! yes it is significantly smaller than 4.5km, but the planet is just a dot, and blurriness around it. same principle for any stars you see. they are point so...
Thu Jul 01, 2010 12:30 am UTC
Forum: Science
Topic: Astronomy Question: Taking pictures of planets
Replies: 31
Views: 4468

### Re: Astronomy Question: Taking pictures of planets

The most important thing you would need is a REALLY big mirror. of course you wouldn't need a mirror that big to just discover a planet, since you can detect objects smaller than the resolving power of a lens or mirror. stars are an example, because most are too far away to be resolved but they are ...
Tue Jun 29, 2010 11:04 pm UTC
Forum: Science
Topic: Tunnel to earth's core with molten iron?
Replies: 65
Views: 7342

### Re: Tunnel to earth's core with molten iron?

Why not use thermite? all you would need is a lot of Iron oxide (rust), and you can add in some lead oxide as well. then you would need a heck of a lot of aluminium dust to mix in. Mix it all together, light it, and then you have a huge amount of iron and lead, evenly mixed, and already melted for y...
Mon Jun 28, 2010 5:36 am UTC
Forum: Science
Topic: salty water electrolysis.
Replies: 10
Views: 3424

### Re: salty water electrolysis.

yes it is common salt. I thought it might produce chlorine gas, but I couldn't smell any, and it was only bubbling (vigorously) from one wire, while the other one just slowly dissolved away. I had a thought it could be copper chloride of some sort, but I can't seem to find a copper chloride that is ...
Mon Jun 28, 2010 12:43 am UTC
Forum: Science
Topic: salty water electrolysis.
Replies: 10
Views: 3424

### salty water electrolysis.

over the last couple of days, I have been experimenting with the electrolysis of salty water. the first time, I used copper wires as the electrodes, and it produced an orange precipitate, then I changed the electrode that dissolved to a steel nail, which turned the precipitate brown. I then started ...
Wed Jun 23, 2010 8:58 am UTC
Topic: 0757: "Toot"
Replies: 103
Views: 23336

### Re: "Toot" discussion (#757)

I should try play that big one since I play the tuba!

they sure are irritating, but I really want to get one! I am a brass player, and the Vuvuzela is technically a brass instrument.
Wed Jun 16, 2010 11:08 am UTC
Forum: Music
Topic: What instrument do you own?
Replies: 172
Views: 30703

### Re: What instrument do you own?

Tuba!
I (my parents) got it for \$800, but that was mostly because I got it at the CSM second hand sale!
Thu Jun 10, 2010 2:05 am UTC
Forum: Music
Topic: Your last and next concert?
Replies: 438
Views: 207581

### Re: Your last and next concert?

Last concert I just played was Saturday just passed with the Christchurch Youth Orchestra
next concert is Saturday 7th August playing in the CYO again. this concert is going to be lots of fun, lots of loud stuff!