Search found 249 matches

by wec01
December 10th, 2019, 2:48 pm
Forum: 2020 Lab Events
Topic: Forensics C
Replies: 83
Views: 31295

Re: Forensics C

I was wondering how in-depth I should go when it comes to the powders/crystals. I assume I have to know how they react with different chemicals, the flame tests, what they can be found in, and their chemical formulas. How far should I go after that? Is there anything specific I should know about th...
by wec01
November 28th, 2019, 6:07 pm
Forum: 2020 Lab Events
Topic: Crime Busters B
Replies: 44
Views: 19251

Re: Crime Busters B

I've been having trouble finding the reactions of the white powders and potassium iodide. I really have no way to test them out myself, so can someone help me out? Iodine is mainly for cornstarch, which will very distinctively turn a dark blue/black, and to distinguish between sodium carbonate and ...
by wec01
November 22nd, 2019, 2:41 pm
Forum: 2020 Study Events
Topic: Fossils B/C
Replies: 217
Views: 146350

Re:

Hi uh how do you differentiate between genus astarte and genus glycymeris?? thnx It looks like there’s a subtle difference in the shape around the umbo and hinge. Astarte has a sharper umbo and curves slightly while glycymeris has a rounder umbo and is more symmetrical around the umbo and hinge. No...
by wec01
November 4th, 2019, 11:44 am
Forum: 2020 Lab Events
Topic: Forensics C
Replies: 83
Views: 31295

Re: Plastics and Fibers

CPScienceDude wrote: November 3rd, 2019, 6:33 pm
febflower wrote: November 3rd, 2019, 6:33 pm Are there any online stores where my school can buy plastic and fiber samples?
I think the North Carolina Scioly website has some. They are frequently out of stock though.
You can also start collecting your own samples from old clothes and plastic containers.
by wec01
November 4th, 2019, 11:42 am
Forum: 2020 Study Events
Topic: Fossils B/C
Replies: 217
Views: 146350

Re: Fossils B/C

DragonTownEpic wrote: November 3rd, 2019, 7:57 pm
DZebra wrote: November 3rd, 2019, 5:13 pm I have one page per fossil in my binder, which has done me well in the past.
However if the information found exceeds one page, you should definitely allow more than one page per fossil.
Yeah there are some fossils that have a lot more information associated with them
by wec01
October 20th, 2019, 3:01 pm
Forum: 2020 Question Marathons
Topic: Sounds of Music C
Replies: 29
Views: 11883

Re: Sounds of Music C

https://musescore.com/static/musescore/scoredata/gen/1/6/5/4433561/c9ed2ee14d245e7415ee44f5157ceafa4b040445/score_0.svg?no-cache=1531731515 1. What key is this passage in? 2. Does this passage have a simple or compound meter? 3. What is the interval between the last two notes of the 6th measure of ...
by wec01
October 18th, 2019, 11:59 pm
Forum: 2020 Question Marathons
Topic: Sounds of Music C
Replies: 29
Views: 11883

Re: Sounds of Music C

https://musescore.com/static/musescore/scoredata/gen/1/6/5/4433561/c9ed2ee14d245e7415ee44f5157ceafa4b040445/score_0.svg?no-cache=1531731515 1. What key is this passage in? 2. Does this passage have a simple or compound meter? 3. What is the interval between the last two notes of the 6th measure of ...
by wec01
October 18th, 2019, 11:33 pm
Forum: 2020 Question Marathons
Topic: Forensics C
Replies: 69
Views: 22676

Re: Forensics C

You are given a mass spectra of a gas that has a molecular ion peak at m/z = 44. The largest peak is at m/z = 29 and there is a small peak at m/z = 15. What was the gas? Argon? I have no idea how to actually do these so that's probably wrong. Think about how a mass spectrometer works - when the sam...
by wec01
October 17th, 2019, 7:55 am
Forum: 2020 Question Marathons
Topic: Sounds of Music C
Replies: 29
Views: 11883

Re: Sounds of Music C

You’re at a Fall Out Boy concert and are 7 meters from a speaker. You determine that the music is 90 dB where you are, and it’s too loud. So, you decide to go further from the speaker until it’s only 60 dB. How far are you from the stage now? A decrease of 30 dB corresponds to a decrease in sound i...
by wec01
October 16th, 2019, 10:56 pm
Forum: 2020 Question Marathons
Topic: Forensics C
Replies: 69
Views: 22676

Re: Forensics C

You are given a mass spectra of a gas that has a molecular ion peak at m/z = 44. The largest peak is at m/z = 29 and there is a small peak at m/z = 15. What was the gas?

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