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by HannahD413
March 16th, 2012, 2:29 pm
Forum: 2012 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 888
Views: 73638

Re: Rocks and Minerals Question Marathon

[img]http://skywalker.cochise.edu/wellerr/mineral/galena/6galena4837.JPG[/img]
by HannahD413
March 14th, 2012, 3:07 pm
Forum: 2012 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 888
Views: 73638

Re: Rocks and Minerals Question Marathon

Milky quartz
by HannahD413
March 13th, 2012, 6:32 pm
Forum: 2012 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 888
Views: 73638

Re: Rocks and Minerals Question Marathon

If not that then
apatite Hardness 5, Formula Ca5(PO4)3(F,Cl,OH)
Wadhk has got it.
by HannahD413
March 13th, 2012, 5:25 pm
Forum: 2012 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 888
Views: 73638

Re: Rocks and Minerals Question Marathon

Nope
by HannahD413
March 13th, 2012, 5:11 pm
Forum: 2012 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 888
Views: 73638

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?
by HannahD413
March 13th, 2012, 4:47 pm
Forum: 2012 Study Events
Topic: Rocks and Minerals Question Marathon
Replies: 888
Views: 73638

Re: Rocks and Minerals Question Marathon

Aragonite
by HannahD413
March 10th, 2012, 2:19 pm
Forum: 2012 Study Events
Topic: Astronomy C
Replies: 176
Views: 30090

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.
by HannahD413
March 10th, 2012, 12:39 pm
Forum: 2012 Study Events
Topic: Astronomy C
Replies: 176
Views: 30090

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...
by HannahD413
February 20th, 2011, 1:33 pm
Forum: 2011 Study Events
Topic: Dynamic Planet B/C
Replies: 482
Views: 49674

Re: Dynamic Planet B/C

Yes, we had to determine the elevations in order to state which way rivers were flowing.
by HannahD413
February 8th, 2011, 3:12 pm
Forum: 2011 Study Events
Topic: Solar System B
Replies: 173
Views: 22366

Re: Solar System B

More on resource sheet fonts: Tahoma in size 5 can be read.

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