## Search found 32 matches

April 26th, 2014, 6:22 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

Looking back actually I'm not sure (but trying to figure it out that number must have come from somewhere) because distance modulus suggests that it would be D~2000 LY=613.5 pc and with m=16 (http://en.wikipedia.org/wiki/NGC_3132) absolute magnitude would be 7, which is obviously really different al...
December 30th, 2013, 8:51 pm
Forum: 2014 Study Events
Topic: Simple Machines B/Compound Machines C
Replies: 196
Views: 38328

### Re: Simple Machines B/Compound Machines C

Hi C Division competitors (and B I suppose could also discuss this) what is the accuracy of your machine so far? Either in grams or percent error, whichever is more consistent- I was kind of envisioning a running discussion like past score threads of boomilevers and other build devices.
October 18th, 2013, 10:02 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

Astronomers have calculated the lower limit for the mass of the black hole GRS 1915+105 given that the velocity amplitude of the mass donator star is 140±15 km/s. Please find this lower limit and show work thank you!
October 16th, 2013, 10:08 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

*edit to be entirely honest I'm not sure what you meant by "prove"
October 15th, 2013, 10:20 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

answer|the progenitor star of Abell 30 originally went through thermonuclear explansion 12,500 years ago and shed its outer layers, then 850 years ago the progenitor star was essentially reborn and re-shed He and C layers after nuclear reactions and such brought enough nebulous material back to the...
October 6th, 2013, 3:41 pm
Forum: 2014 Build Events
Topic: Mission Possible C
Replies: 554
Views: 51725

### Re: Mission Possible C

I think in the past that example of forming the precipitate has been counted for CHEM-EMS because other than burning (which is tenchnically chemical but usually counted in the ETL as thermal) that is the only way to trigger an EMS action with chem
September 15th, 2013, 2:49 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

maybe
September 14th, 2013, 12:23 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

LOL maybe
September 11th, 2013, 2:52 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

ngc3132, the star in the image is about absolute magnitude 0.3 (at least the progenitor star is)

Edit: sorry people I am having major technical difficulties with my "hide" function so I'm just writing the answer out for the sake of transparency
September 9th, 2013, 5:42 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

sorry about the hide function, I tried to use the command but it didn't work. I'll try and fix it.

Ok, at what temperature does a protostar become classified as a T-Tauri star? This sets it on what path on an HR Diagram?
September 8th, 2013, 5:48 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

[hide] w49b, it would have been seen supernova-ing around 1000 AD, the nebula contains nickel and iron [/hide]
September 5th, 2013, 3:57 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

yeah go for it, thats pretty much what I was looking for
September 2nd, 2013, 6:49 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

ok, what is the r-process? What DSOs from this year's rules might eventually have (or have had) the r-process?

Also are these questions supposed to be more like concept or trivia based?
September 2nd, 2013, 5:19 pm
Forum: 2014 Question Marathons
Topic: Astronomy C Question Marathon
Replies: 81
Views: 12809

### Re: Astronomy C Question Marathon

Its like the change in radius for pulsating variables right
September 2nd, 2013, 1:08 pm
Forum: 2014 Question Marathons
Topic: Solar System B Question Marathon
Replies: 74
Views: 11686