Search found 89 matches

by cifutielu
January 15th, 2015, 11:06 am
Forum: 2015 Study Events
Topic: Astronomy C
Replies: 147
Views: 30612

Re: Astronomy C

syo_astro, right now I don't have any general questions, but then I keep looking at the AAVSO test and then I have more questions :P I'm having trouble with 28: Star G is a M2V star at a distance of 50 parsec. Planet H orbits Star G at a distance of 0.01 AU, and has a radius equal to that of Jupiter...
by cifutielu
January 13th, 2015, 6:46 pm
Forum: 2015 Study Events
Topic: Astronomy C
Replies: 147
Views: 30612

Re: Astronomy C

In the Astronomy wiki, there is a very nice formula sheet at the bottom under resources. A question though: Under "Hubble's Law" it lists the value of H as H = 20km/s/Mpc. Further down under "Age of the Universe" it lists the value of H as 70km/s/Mpc, which is the number we are familiar with. Is th...
by cifutielu
January 11th, 2015, 8:09 pm
Forum: 2015 Invitationals, Regionals, and States
Topic: Illinois 2015
Replies: 76
Views: 13786

Re: Illinois 2015

bernard wrote:
cifutielu wrote:
nomynameisnotkevin wrote:Does anyone have Hinsdale South that would be willing to trade? I have plenty of last year's complete invite sets, as well as parts of one (and soon two) from this year.

Thanks!
PM sent
I'm not from Illinois but I have some tests for Washington invites that I'd be willing to trade.
PM sent
by cifutielu
January 11th, 2015, 8:07 pm
Forum: 2015 Invitationals, Regionals, and States
Topic: Southern California 2015
Replies: 78
Views: 18613

Re: Southern California 2015

Anyone from Division C want to trade tests from this season's invites? I'm from Illinois; you don't have to worry about giving tests to a rival!

PM me if interested.
by cifutielu
January 11th, 2015, 8:06 pm
Forum: 2015 Invitationals, Regionals, and States
Topic: Ohio 2015
Replies: 109
Views: 27133

Re: Ohio 2015

Anyone from Division C want to trade tests from this season's invites? I'm from Illinois; you don't have to worry about giving tests to a rival!

PM me if interested.
by cifutielu
January 11th, 2015, 8:05 pm
Forum: 2015 Invitationals, Regionals, and States
Topic: New Jersey 2015
Replies: 81
Views: 18161

Re: New Jersey 2015

Anyone from Division C want to trade tests from this season's invites? I'm from Illinois; you don't have to worry about giving tests to a rival!

PM me if interested.
by cifutielu
January 11th, 2015, 8:04 pm
Forum: 2015 Invitationals, Regionals, and States
Topic: Georgia 2015
Replies: 149
Views: 25773

Re: Georgia 2015

Anyone from Division C want to trade tests from this season's invites? I'm from Illinois; you don't have to worry about giving tests to a rival!

PM me if interested.
by cifutielu
January 11th, 2015, 7:55 pm
Forum: 2015 Invitationals, Regionals, and States
Topic: Illinois 2015
Replies: 76
Views: 13786

Re: Illinois 2015

nomynameisnotkevin wrote:Does anyone have Hinsdale South that would be willing to trade? I have plenty of last year's complete invite sets, as well as parts of one (and soon two) from this year.

Thanks!
PM sent
by cifutielu
January 11th, 2015, 4:40 pm
Forum: 2015 Study Events
Topic: Astronomy C
Replies: 147
Views: 30612

Re: Astronomy C

How can I solve 24 on the practice test? Image B1 shows the radial velocity curve of host Star A, around which Planet B orbits. Star A has the same mass, radius, and luminosity as the sun. Assume that the system has no inclination and Planet B has 0 eccentricity (a circular orbit). (a) What is the d...
by cifutielu
December 27th, 2014, 11:48 am
Forum: 2015 Study Events
Topic: Astronomy C
Replies: 147
Views: 30612

Re: Astronomy C

For part e of that question, it asks us to use the phase diagram for water along with the temperature to determine if the planet is habitable. How can I use the phase diagram for water to help determine the planet's habitability? I'm not exactly sure how I can use the diagram to my advantage. It is...

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