## Search found 43 matches

March 18th, 2019, 9:45 pm
Forum: 2019 Study Events
Topic: Astronomy C
Replies: 125
Views: 22925

### Re: Astronomy C

On the golden gate test, how would you do 17 c, d, and f? Explantion|17a use keplers third law- 9.965 solar mass 17b mass times distance = mass times distance- 5.97 solar mass 17c You know the distance of star b is 20 au. Convert to km, multiply by 2pi (it's a circular orbit). The period is 112 yea...
March 18th, 2019, 8:14 pm
Forum: 2019 Study Events
Topic: Astronomy C
Replies: 125
Views: 22925

### Re: Astronomy C

On the golden gate test, how would you do 17 c, d, and f?
March 6th, 2019, 9:05 pm
Forum: 2019 Question Marathons
Topic: Astronomy C
Replies: 55
Views: 7808

### Re: Astronomy C

Yup. I didn't specify whether it was a galaxy with a single cepheid or not but that's what I meant so props to you.

February 24th, 2019, 9:48 am
Forum: General Chat
Topic: Scioly Achievement List
Replies: 184
Views: 29580

### Re: Scioly Achievement List

Have you ever done any of the following? CLUTCH ACHIEVEMENT: Start studying for an event 24 hours before competition MEGA-CLUTCH ACHIEVEMENT: Start studying for an event the day of competition ULTRA-CLUTCH ACHIEVEMENT: Don't start working until the day of Nationals SPEEDBUILD ACHIEVEMENT: Your engi...
February 20th, 2019, 7:51 am
Forum: 2019 Study Events
Topic: Dynamic Planet B/C
Replies: 245
Views: 31814

### Re: Dynamic Planet B/C

Those as well as the diagrams of a glacier with fill in the blanks.
February 19th, 2019, 6:42 pm
Forum: 2019 Study Events
Topic: Dynamic Planet B/C
Replies: 245
Views: 31814

### Re: Dynamic Planet B/C

Are there any guides on how to read glacier maps and diagrams? I feel like I struggle in these questions and I need to learn how to manage them.
February 7th, 2019, 7:11 pm
Forum: 2019 Study Events
Topic: Parasitology B/C [NY TRIAL]
Replies: 2
Views: 1217

### Re: Parasitology B/C [NY TRIAL]

February 6th, 2019, 8:54 pm
Forum: 2019 Lab Events
Topic: Sounds of Music C
Replies: 204
Views: 30419

### Re: Sounds of Music C

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February 6th, 2019, 8:32 pm
Forum: 2019 Question Marathons
Topic: Astronomy C
Replies: 55
Views: 7808

### Re: Astronomy C

I just went with a random number that would be kinda smooth for plugging in. I just realized that its only a couple times brighter than the Sun.
February 6th, 2019, 6:54 pm
Forum: 2019 Question Marathons
Topic: Astronomy C
Replies: 55
Views: 7808

### Re: Astronomy C

Alright, so:

The luminosity of Galaxy A is 2.692x10^27 watts. Galaxy A has an apparent magnitude of 6.89.
Galaxy B contains Cepheid variable stars with a period of 0.04252 years. Galaxy B has an apparent magnitude of 4.37.

Calculate the ratio of the distance to Galaxy A to the distance to Galaxy B.