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by c0c05w311y
February 14th, 2019, 10:25 pm
Forum: 2019 Study Events
Topic: Astronomy C
Replies: 125
Views: 21064

Re: Astronomy C

Anybody have the image set for the carnegie mellon test?
Sure. https://drive.google.com/file/d/12qdcF8 ... sp=sharing
I'm pretty sure this is the right version.
Let me know if you have any questions or comments about the exam!
by c0c05w311y
April 26th, 2018, 10:00 pm
Forum: 2018 Question Marathons
Topic: Astronomy C
Replies: 89
Views: 18499

Re: Astronomy C

I'll try to answer Unome's question:|1. DEM L241 2. From top to bottom, radio, xray, gamma 3. 2? I'm basing this on how many dots appear to be on top of each other. However I'm really not sure if this is how the question was supposed to be answered. 4. The bottom graph is gamma, and the system is a...
by c0c05w311y
March 7th, 2018, 11:37 am
Forum: 2018 Question Marathons
Topic: Optics B/C
Replies: 66
Views: 7672

Re: Optics B/C

What is Compton scattering? Is it elastic or inelastic? What general type of EM radiation does it affect? Describe the mechanism by which it functions. Answer:|Compton scattering is scattering of a photon from a charged particle (usually an electron) . It is inelastic: the energy of the photon is d...
by c0c05w311y
March 1st, 2018, 4:16 pm
Forum: 2018 Question Marathons
Topic: Optics B/C
Replies: 66
Views: 7672

Re: Optics B/C

Consider an f/4 refracting telescope with an aperture diameter of 550mm, and an f/14 telescope. a. which telescope would be better for taking pictures? b. which telescope would be better for making precise observations, and why? c. Name three typical abberations. What is a coma and how do you fix i...
by c0c05w311y
March 1st, 2018, 12:54 pm
Forum: 2018 Question Marathons
Topic: Astronomy C
Replies: 89
Views: 18499

Re: Astronomy C

there's no way I would know this if I hadn't read the paper that this graph came from a few months ago, but the blue lines are constant magnetic field strength since its basically proportional to sqrt(P*Pdot) , the green lines are constant characteristic age since thats P/(2*Pdot) , and the light bl...
by c0c05w311y
February 27th, 2018, 7:04 am
Forum: 2018 Question Marathons
Topic: Optics B/C
Replies: 66
Views: 7672

Re: Optics B/C

Consider an f/4 refracting telescope with an aperture diameter of 550mm, and an f/14 telescope. a. which telescope would be better for taking pictures? b. which telescope would be better for making precise observations, and why? c. Name three typical abberations. What is a coma and how do you fix it...
by c0c05w311y
February 26th, 2018, 2:24 pm
Forum: 2018 Question Marathons
Topic: Optics B/C
Replies: 66
Views: 7672

Re: Optics B/C

Answer:|A helium neon laser has a cavity filled with a mixture of helium and neon (85% He) with an anode and cathode at opposite ends plus a reflector at the back, a laser bore tube in the middle for the beam to form in, and an "output coupler" (aka a mirror with 1% transmittance) at the front. Whe...
by c0c05w311y
February 26th, 2018, 1:43 pm
Forum: 2018 Question Marathons
Topic: Astronomy C
Replies: 89
Views: 18499

Re: Astronomy C

Unome and everyone really, could you please use image hosting site imgbb instead of imgur or something else so that PM2017, Jonboyage, and I (probably others too) can access the images at school? No need to re-post, just for the future. Thanks
by c0c05w311y
February 18th, 2018, 12:31 pm
Forum: 2018 Invitationals
Topic: Science Olympiad at UPenn 2018 Invitational
Replies: 78
Views: 15401

Re: Science Olympiad at UPenn 2018 Invitational

Overall, a great competition! I'll provide some feedback on the events. Astronomy: Really good test in my opinion. The questions were interesting. It wasn't too short or too long (although there's almost no such thing as too long in this kind of event). Hovercraft: It was run well and the test was g...
by c0c05w311y
February 6th, 2018, 9:41 pm
Forum: 2018 Question Marathons
Topic: Astronomy C
Replies: 89
Views: 18499

Re: Astronomy C

Thats a good explanation for quantum tunneling, but im not quite sure what you mean by "in opposite directions" and where "both are very low". For quantum tunneling you got it: it allows particles to get close enough to fuse while their thermal energy doesn't under classical physics. Probability to ...

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