Hey Sooo I have like less than 3 hours left for finishing this

>>280753
What is the T_m stand for?

>>280757
It's the mean period

>>280753
For r1,r2,r3,r4 which mass is being used to calculate the force?

>>280765
m2, and for calculating the force while changing m we used r2

File: eee.jpg (11KB, 576x583px) Image search: [Google]

11KB, 576x583px

>>280765
r3 actually, sorry. anyway i generated a data fit curve for m1m2m3 and i found the correlation coefficient (maybe) which should be 0.99775, but i'm not sure actually

>>280753
Use the equation to find centripetal Force given all the values. F is ma and rw2 has the same units as acceleration so I guess F_r=F*r.

Too lazy to check but at least the units work out.

>>280782
I know how to do that, but I was asked to find the correlation coefficient. I've already found the centripetal force, as you can see (Fm is the mean of the centripetal force of 30 measurements). I should also calculate the X2 and verify a few other things

>>280782
Actually it would have to be a ratio of the radii compared to r3. Are you sure it isn't r2 though since it has the same value for m2?

>>280753
I would just make two plots. One with F vs m and F vs r. As long as they are straight/linear, it matches the equation.

>>280789
Thanks god you made me notice. Nope, it's a mistake I made while writing the values on Excel from the notes I took in the lab. I inverted r2 with r3 (as you can see it makes sense: 2,3,5,6)
>>280797
Yeaah but as I said I have to find the correlation coefficient. It's what the professor asked

>>280801
Your value for the correlation coefficient sounds right then. For r or m, if either increases, the other has to increase assuming every other variable stays fixed.

File: dsfh.png (4KB, 535x108px) Image search: [Google]

4KB, 535x108px

>>280802
I still don't understand why my X2 value for F(m) is "12791.3". It's too damn big

>>280805
idk about these statistics parts but check to make sure you're using the right values. Your fit is good which means the chi should be low.

>>280806
values are good :<

File: dsfhsd.png (3KB, 217x181px) Image search: [Google]

3KB, 217x181px

>>280806

>>280805
>>280810
I don't know what this program is but what's s[[i]]?

>>280811
It's the index

>>280813
Of what?

>>280814
Of the 3 x and 3 y values

>>280815
What formula are you using for X2?

File: cvsd.png (5KB, 275x92px) Image search: [Google]

5KB, 275x92px

>>280816
The one you see in the code, lol.

>>280818
Sorry but I haven't learned this part of statistics so can't help you from here on out.

>>280820
I see, thank you anyway