[img]http://skywalker.cochise.edu/wellerr/mineral/galena/6galena4837.JPG[/img]
Search found 69 matches
- March 16th, 2012, 2:29 pm
- Forum: 2012 Study Events
- Topic: Rocks and Minerals Question Marathon
- Replies: 888
- Views: 148455
Re: Rocks and Minerals Question Marathon
- March 14th, 2012, 3:07 pm
- Forum: 2012 Study Events
- Topic: Rocks and Minerals Question Marathon
- Replies: 888
- Views: 148455
Re: Rocks and Minerals Question Marathon
Milky quartz
- March 13th, 2012, 6:32 pm
- Forum: 2012 Study Events
- Topic: Rocks and Minerals Question Marathon
- Replies: 888
- Views: 148455
Re: Rocks and Minerals Question Marathon
Wadhk has got it.Wadhk wrote:If not that thenapatite Hardness 5, Formula Ca5(PO4)3(F,Cl,OH)
- March 13th, 2012, 5:25 pm
- Forum: 2012 Study Events
- Topic: Rocks and Minerals Question Marathon
- Replies: 888
- Views: 148455
- March 13th, 2012, 5:11 pm
- Forum: 2012 Study Events
- Topic: Rocks and Minerals Question Marathon
- Replies: 888
- Views: 148455
Re: Rocks and Minerals Question Marathon
[img]http://www.daviddarling.info/images/apatite.jpg[/img] Also: 1. What is/are the chemical formula(s) for this mineral? 2. What is its hardness?
- March 13th, 2012, 4:47 pm
- Forum: 2012 Study Events
- Topic: Rocks and Minerals Question Marathon
- Replies: 888
- Views: 148455
Re: Rocks and Minerals Question Marathon
Aragonite
- March 10th, 2012, 2:19 pm
- Forum: 2012 Study Events
- Topic: Astronomy C
- Replies: 176
- Views: 58247
Re: Astronomy C
If you use 19.6 as the magnitude (rather than 19.3, which is what we were using during the competition), I can see how you get 8.3 Mpc, but not 83. -5+5log(83*10^6)=35.6 which does not equal 10+19.6=29.6, -5+5log(8.3*10^6) does however.
- March 10th, 2012, 12:39 pm
- Forum: 2012 Study Events
- Topic: Astronomy C
- Replies: 176
- Views: 58247
Re: Astronomy C
Can someone help double check the answer to this question? 19. Supernova 2011fe was one of the best this year. What is the distance to it in Megaparsecs? Its light curve is shown below a) 7.1 Mpc b) 83 Mpc c) 692 Mpc d) 46 Mpc e) .52 Mpc The light curve is shown to peak at an apparent magnitude of a...
- February 20th, 2011, 1:33 pm
- Forum: 2011 Study Events
- Topic: Dynamic Planet B/C
- Replies: 482
- Views: 105519
Re: Dynamic Planet B/C
Yes, we had to determine the elevations in order to state which way rivers were flowing.
- February 8th, 2011, 3:12 pm
- Forum: 2011 Study Events
- Topic: Solar System B
- Replies: 173
- Views: 55331
Re: Solar System B
More on resource sheet fonts: Tahoma in size 5 can be read.