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Re: Fossils B/C

Posted: February 29th, 2020, 4:05 pm
by dchen22
dchen22 wrote:
February 29th, 2020, 4:01 pm
Does anyone know how to get the answer to or where the info comes from for PUSO Fossils Test Station 10 Question 6? Thanks in advance.
Question: Following a massive bolide impact in the year 2888, which specimen would you expect to
find in the highest biomass?
Answer: Psaronius

Re: Fossils B/C

Posted: February 29th, 2020, 4:11 pm
by twig
Does anyone know the age ranges of each of the isotopes are for absolute dating?

Re: Fossils B/C

Posted: February 29th, 2020, 4:18 pm
by EwwPhysics
twig wrote:
February 29th, 2020, 4:11 pm
Does anyone know the age ranges of each of the isotopes are for absolute dating?
I assume you mean half-lives?

If so, I would recommend just looking up a list and copying and pasting - there are A BUNCH of isotopes so I can't list them here.

Re: Fossils B/C

Posted: February 29th, 2020, 4:20 pm
by ChimpLopez
twig wrote:
February 29th, 2020, 4:11 pm
Does anyone know the age ranges of each of the isotopes are for absolute dating?
I just printed out the chart found at http://earthsci.org/space/space/geotime ... adate.html under "more parent-daughter relationships" and it's worked out for me so far

Re: Fossils B/C

Posted: March 4th, 2020, 2:47 pm
by twig
Thanks guys!
What are the equations for speed and dimensionless speed?
I just need to figure out the equations for speed and dimensionless speed using the variables of track length, stride length, and leg length.
(I have absolutely no clue how to do this and since last year it was tested, might as well put it in our binder now before I forget again ( and I carry my partner so if I don't know something, then he doesn't know it most of the time)

Thanks in advance, and I hope to see some of you at CalTech!

Re: Fossils B/C

Posted: March 5th, 2020, 3:08 pm
by dchen22
twig wrote:
March 4th, 2020, 2:47 pm
Thanks guys!
What are the equations for speed and dimensionless speed?
I just need to figure out the equations for speed and dimensionless speed using the variables of track length, stride length, and leg length.
(I have absolutely no clue how to do this and since last year it was tested, might as well put it in our binder now before I forget again ( and I carry my partner so if I don't know something, then he doesn't know it most of the time)

Thanks in advance, and I hope to see some of you at CalTech!
Leg Length = Hip Height = 4 * Track Length
Relative Stride Length (RSL) = Stride Length / Leg Length
Dimensionless Speed ≈ (RSL - 0.72) / 1.19 ≈ RSL * 0.83 - 0.7 ≈ (RSL - 1) / 1.1
Speed = Dimensionless Speed * sqrt(Leg Length / g)

Re: Fossils B/C

Posted: March 6th, 2020, 9:48 am
by BennyTheJett
Who's excited for rocks to come in next year?

Re: Fossils B/C

Posted: March 6th, 2020, 12:59 pm
by EwwPhysics
BennyTheJett wrote:
March 6th, 2020, 9:48 am
Who's excited for rocks to come in next year?
ehhhhhhhhhhhhhhh I've got to say that I prefer fossils, I really like the paleobiology/life aspect. Rocks will be ok, but in my opinion fossils is better.

Re: Fossils B/C

Posted: March 7th, 2020, 10:41 am
by twig
Kinda excited, but not really... bc I prefer fossils more.
I'm still sad about states being canceled due to coronavirus and I have cm soon...

Re: Fossils B/C

Posted: March 7th, 2020, 11:03 am
by EwwPhysics
twig wrote:
March 7th, 2020, 10:41 am
I'm still sad about states being canceled due to coronavirus and I have cm soon...
It must be horrible to have prepared and studied so much only to have states be canceled. My sympathies go to everyone in SoCal.
We can hope that this won’t happen in other states, but it unfortunately probably won’t be the case :/ I just try to remember that having fun learning is the reason scioly exists, not going to competitions (though that is a fun part of it).

To make this post related to fossils, how much has everyone seen about mass extinctions? I don’t think I’ve had a single question in the 3 competitions I’ve been to so far.