Forensics C

User avatar
EastStroudsburg13
Administrator
Administrator
Posts: 3154
Joined: January 17th, 2009, 7:32 am
Division: Grad
State: MD
Pronouns: He/Him/His
Location: At work trying to be a real adult
Has thanked: 17 times
Been thanked: 118 times
Contact:

Re: Forensics C

Post by EastStroudsburg13 » January 4th, 2018, 6:48 am

pikachu4919 wrote:
depo1213 wrote:
pikachu4919 wrote:
What do you mean by appendices?
I mean like where they refer to an apendix in a question and then you have to go into the back of the book to look for Appendix A or B.

For example the questions could be like determine the fibers. Fibers can be found in Appendix A. So you have to go to the back of the booklet for find it.
Huh, I've never taken a test that has done that...
I've taken Astro tests that do that. It can be a little disorienting, but if the test proctor allows you to detach pages from the booklet, I'd definitely recommend you do that. It's a good general science skill to be able to get data from an external reference and use it to answer a question.
East Stroudsburg South Class of 2012, Alumnus of JT Lambert, Drexel University Class of 2017

Helpful Links
Wiki
Wiki Pages that Need Work
FAQ and SciOly FAQ Wiki
Chat (See IRC Wiki for more info)
BBCode Wiki


So long, and thanks for all the Future Dictator titles!

User avatar
pikachu4919
Moderator
Moderator
Posts: 705
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Pronouns: She/Her/Hers
Location: West [Favorite Fightin' Frenchman!]
Has thanked: 31 times
Been thanked: 81 times

Re: Forensics C

Post by pikachu4919 » January 8th, 2018, 8:17 pm

WhatScience? wrote:Why would you even want to touch the dead body of an animal?
Because examining deaths are a thing in forensics, in both the SciOly event and real life. :P

After all...
Image
Carmel HS (IN) '16
Purdue BioE '20
Nationals 2016 ~ 4th place Forensics


Not throwin' away my shot!
MY CABBAGES!

pikachu4919's Userpage

Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.

Rate my tests!

Stefannli
Member
Member
Posts: 11
Joined: January 4th, 2018, 9:10 am
Division: C
State: DE
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by Stefannli » January 9th, 2018, 7:54 am

Can anyone please explain HOW to determine the molecular formula of this mass spec? Thanks! Image

d4dd7y00n
Member
Member
Posts: 8
Joined: December 8th, 2016, 4:13 am
Division: C
State: GA
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by d4dd7y00n » January 11th, 2018, 5:18 am

Stefannli wrote:Can anyone please explain HOW to determine the molecular formula of this mass spec? Thanks! Image
The peak on the rightmost side is tells you the molar mass of the molecular formula. You see that the rightmost peak is around m/e of ~46, which corresponds to the molar mass of the ethanol

Stefannli
Member
Member
Posts: 11
Joined: January 4th, 2018, 9:10 am
Division: C
State: DE
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by Stefannli » January 11th, 2018, 12:36 pm

d4dd7y00n wrote:
Stefannli wrote:Can anyone please explain HOW to determine the molecular formula of this mass spec? Thanks! Image
The peak on the rightmost side is tells you the molar mass of the molecular formula. You see that the rightmost peak is around m/e of ~46, which corresponds to the molar mass of the ethanol


I was asking for the molecular formula, not the molar mass. Sorry for any confusion.

User avatar
Magikarpmaster629
Exalted Member
Exalted Member
Posts: 578
Joined: October 7th, 2014, 3:03 pm
Division: Grad
State: MA
Location: No idea, but I can tell you exactly how fast I'm going
Has thanked: 0
Been thanked: 1 time

Re: Forensics C

Post by Magikarpmaster629 » January 13th, 2018, 5:22 am

Stefannli wrote:
d4dd7y00n wrote:
Stefannli wrote:Can anyone please explain HOW to determine the molecular formula of this mass spec? Thanks!
The peak on the rightmost side is tells you the molar mass of the molecular formula. You see that the rightmost peak is around m/e of ~46, which corresponds to the molar mass of the ethanol
I was asking for the molecular formula, not the molar mass. Sorry for any confusion.
Usually the molecules used for these are taken from a list of carbohydrates; find a list for this and match the molecular weight to the carbohydrate.
Ladue Science Olympiad (2014ish-2017)

A wild goose flies over a pond, leaving behind a voice in the wind.
A man passes through this world, leaving behind a name.

User avatar
Panda Weasley
Member
Member
Posts: 133
Joined: September 27th, 2014, 6:24 am
Division: C
Location: Ravenclaw Tower
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by Panda Weasley » January 18th, 2018, 6:38 pm

Have yall ever had to determine the direction of impact for glass?
DFTBA!
Events 2019: Forensics and Fossils
Proud member of Teh Ento Cult.
:ugeek:

Stefannli
Member
Member
Posts: 11
Joined: January 4th, 2018, 9:10 am
Division: C
State: DE
Has thanked: 0
Been thanked: 0

Re: Forensics C

Post by Stefannli » January 20th, 2018, 7:06 am

Are Bunsen burners and hot water baths usually provided in invitational competitions such as Princeton?

User avatar
pikachu4919
Moderator
Moderator
Posts: 705
Joined: December 7th, 2012, 2:30 pm
Division: Grad
State: IN
Pronouns: She/Her/Hers
Location: West [Favorite Fightin' Frenchman!]
Has thanked: 31 times
Been thanked: 81 times

Re: Forensics C

Post by pikachu4919 » January 20th, 2018, 8:48 pm

Stefannli wrote:Are Bunsen burners and hot water baths usually provided in invitational competitions such as Princeton?
They should be. That's on the event supervisor.
Panda Weasley wrote:Have yall ever had to determine the direction of impact for glass?
I've personally never seen it on any tests I've taken, nor have I used it yet on tests that I've written. I think the reason why would be that maybe supervisors don't wanna write a problem for it or a lot of the images may not be able to show much detail of the impact spot beyond the spot where it hit and the resulting cracks surrounding it.

Thanks for the idea tho, I’ll consider it for the future :twisted:
Magikarpmaster629 wrote:
Stefannli wrote:
d4dd7y00n wrote:
The peak on the rightmost side is tells you the molar mass of the molecular formula. You see that the rightmost peak is around m/e of ~46, which corresponds to the molar mass of the ethanol
I was asking for the molecular formula, not the molar mass. Sorry for any confusion.
Usually the molecules used for these are taken from a list of carbohydrates; find a list for this and match the molecular weight to the carbohydrate.
In reality it's waaaaaayyyy more complicated than that. It's quite an advanced organic chemistry topic, actually. Those textbooks may have some info on that.
Last edited by pikachu4919 on January 21st, 2018, 8:06 pm, edited 1 time in total.
Carmel HS (IN) '16
Purdue BioE '20
Nationals 2016 ~ 4th place Forensics


Not throwin' away my shot!
MY CABBAGES!

pikachu4919's Userpage

Opinions expressed on this site are not official; the only place for official rules changes and FAQs is soinc.org.

Rate my tests!

User avatar
windu34
Staff Emeritus
Staff Emeritus
Posts: 1364
Joined: April 19th, 2015, 6:37 pm
Division: Grad
State: FL
Location: Gainesville, Florida
Has thanked: 1 time
Been thanked: 22 times

Re: Forensics C

Post by windu34 » January 20th, 2018, 10:11 pm

pikachu4919 wrote:
Stefannli wrote:Are Bunsen burners and hot water baths usually provided in invitational competitions such as Princeton?
They should be. That's on the event supervisor.
:lol:
Boca Raton Community High School Alumni
Florida Science Olympiad Board of Directors
National Physical Sciences Rules Committee Member
kevin@floridascienceolympiad.org || windu34's Userpage

Locked

Return to “2018 Lab Events”

Who is online

Users browsing this forum: No registered users and 1 guest