Search found 7 matches

by cacodemon
June 12th, 2019, 10:05 am
Forum: General Competition
Topic: Scioly Summer Study Session 2019
Replies: 112
Views: 53227

Re: Scioly Summer Study Session 2019

For Astronomy, the topic is listed as being "star and galaxy formation and evolution". However, according to the event supervisor webinar (http://chandra.harvard.edu/edu/olympiad_2019.html), they say the topic will remain the same as this year ("stellar evolution in normal and starburst galaxies") ...
by cacodemon
June 11th, 2019, 11:22 am
Forum: General Competition
Topic: Scioly Summer Study Session 2019
Replies: 112
Views: 53227

Re: Scioly Summer Study Session 2019

For Astronomy, the topic is listed as being "star and galaxy formation and evolution". However, according to the event supervisor webinar (http://chandra.harvard.edu/edu/olympiad_2019.html), they say the topic will remain the same as this year ("stellar evolution in normal and starburst galaxies") b...
by cacodemon
December 29th, 2018, 8:33 pm
Forum: 2019 Question Marathons
Topic: Dynamic Planet B/C
Replies: 83
Views: 14500

Re: Dynamic Planet B/C

I was referring to the previous question which I wrote, sorry for the confusion.
by cacodemon
December 29th, 2018, 12:57 pm
Forum: 2019 Question Marathons
Topic: Dynamic Planet B/C
Replies: 83
Views: 14500

Re: Dynamic Planet B/C

Nope, somewhat of a trick question. Sea level would not change. An ice shelf is floating on water by buoyancy -- sea level rise is proportional to volume of water displaced. So when the ice shelf melts, there is no change in sea level because the water displaced by the ice shelf is filled by the vol...
by cacodemon
December 19th, 2018, 4:58 pm
Forum: 2019 Question Marathons
Topic: Dynamic Planet B/C
Replies: 83
Views: 14500

Re: Dynamic Planet B/C

Cordilleran merged with Laurentide at continental divide
In 2002, a volume of roughly 7.15 x 10^5 km^3 rapidly disintegrated from the Larsen B sector of the Larsen Ice Shelf.
By how much did sea level rise due to this event only? The density of ice is 917 kg/m^3 and density of water is 997 kg/m^3.
by cacodemon
April 19th, 2018, 7:46 pm
Forum: 2018 Question Marathons
Topic: Astronomy C
Replies: 89
Views: 19044

Re: Astronomy C

[hide] 1) PM2017: looks good 2) yep: d2 = d1 * sqrt(2.512^m2-m1) => d2 = 34.16 pc. 3) This question was kind of obscure and probably won't come up this year (maybe not ever on a scio astro test) I should have mentioned that the GMC was in virial equilibrium. The way I did it was: using linewidth-siz...
by cacodemon
April 11th, 2018, 7:09 pm
Forum: 2018 Question Marathons
Topic: Astronomy C
Replies: 89
Views: 19044

Re: Astronomy C

Since nobody has posted on this for a while I thought I would add a few questions. Keep in mind these are unrelated. 1) Derive the distance modulus relationship (prove that m-M = 5 log (D) - 5,, or if you want m-M = 5 log (D/10)). 2) Star 1 has the same absolute luminosity has Star 2. The apparent m...

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