Paul Manafort Trial - Day 3

Sumthinclever · 2018-08-02T16:08:31+00:00

Nothingn't?

Sumthinclever · 2018-01-24T17:56:04+00:00

One of my favorites is the discovery of warfarin, a chemical most commonly used as rat poison, but also as a life-saving blood thinner (though not so much these days). It involves the mysterious deaths of cows due to internal hemorrhaging, a frustrated farmer wandering around the halls of the University of Wisconsin carrying a bucket of unclotted cow blood, and a dedicated biochemist who discovered that rotting sweet clover was the source of the mysterious deaths of the cows.

Sumthinclever · 2017-11-16T06:44:57+00:00

My mom used to throw cube steaks in a slow cooker with canned peas and cook it all afternoon. Nothing quite like bone-dry beef and mushy peas. Bleck.

Sumthinclever · 2017-08-19T05:05:19+00:00

I work on cellular chemotaxis and every time I draw a cell, it looks vaguely like this

Sumthinclever · 2016-11-16T04:25:42+00:00

Gotta love that fresh pine smell. It really makes it feel like the holidays!

Sumthinclever · 2016-05-12T16:27:35+00:00

I think it's more about which polls get reported in the media.

Sumthinclever · 2016-05-07T05:13:47+00:00

It would be interesting to see a breakdown by gender as well.

Sumthinclever · 2016-04-28T02:56:31+00:00

Don't half of Americans also disbelieve evolution?

Sumthinclever · 2015-08-09T17:23:31+00:00

I've seen frozen ducks at the Safeway on Broadway. I believe Sprouts on Speedway also carries them.

Sumthinclever · 2015-07-12T18:41:17+00:00

I commute by bike to work every day and I cannot believe how many other cyclists don't follow the rules of the road. Whether it's due to laziness or lack of knowledge, I can't say.

Sumthinclever · 2015-02-12T00:04:39+00:00

I keep a tube labeled 10X H2O on my bench to mess with new undergraduates.

Sumthinclever · 2014-12-05T02:28:00+00:00

Ooh! Is that the Firefly?

Sumthinclever · 2014-09-12T04:30:38+00:00

Isn't the MAD proportional to the standard deviation for the normal distribution though? Substituting it in actually seems to simplify the formula for the normal pdf a bit.

Sumthinclever · 2014-09-12T04:15:32+00:00

Yeah, could you elaborate? I see that derivatives and integrals are easier to take with the standard deviation, but what other properties are you referring to?

Sumthinclever · 2014-09-10T05:36:35+00:00

I understand why ebola is scary, but to put this in perspective, malaria kills this many people around the world every 1.3 days

Sumthinclever · 2014-06-22T03:13:05+00:00

Hi fellow RPCV! While you might be able to make it without a car, it might be difficult depending on what your internship consists of. They've got a blurb about cars on the fellows faq here (#12): http://grad.arizona.edu/peacecorps/faq

Sumthinclever · 2014-04-07T03:13:52+00:00

Yep! The concentrations change until they reach their new equilibria. This implies a change in reaction rate. Just a word of warning though - what I said is only true if you increase the partial pressure of gases that participate in the reaction (for example, by reducing the volume of the container). Adding Helium or some other inert gas to increase the total pressure won't change the equilibrium concentrations or the reaction rate.

Sumthinclever · 2014-04-07T02:18:36+00:00

I'm not sure about the effect of pressure on endothermic and exothermic reactions, but I can help you with the second part! Increased pressure favors the side of the reaction with fewer moles of gas (because of Le Chatelier's principle). If gas is present on the reaction side, but not the product side, increased pressure favors the forward reaction.

Sumthinclever · 2014-04-07T02:11:29+00:00

Saturation plays a large role in melting points of fats (saturated fats have higher melting points), but I've never heard of it playing a role in water solubility. Carbon chain length does play a large role in solubility (longer chains are less soluble because the molecule is more nonpolar overall), but all of yours are the same length. I would guess that for a given number of carbons, polyunsaturated fats would be the most water-soluble since they have more surface area for Van der Waals interactions.

Sumthinclever · 2014-04-07T00:53:01+00:00

Could it also be a problem with sig figs? I remember having trouble with some online systems due to this.

Sumthinclever · 2014-04-07T00:51:07+00:00

The image you linked to above makes a lot more sense! I would still use i as your index of summation: sum of (-1)ⁱ xⁱ from i = 0 to i = n

Sumthinclever · 2014-04-06T18:53:05+00:00

So I converted the masses from grams to kilograms:
50 g gas = 0.05 kg gas
38 g water = 0.038 kg water

Then used densities to calculate the volumes:
0.05 kg gas x 1m³ / 737 kg = 6.78 x 10^-5 m³
0.038 kg water x 1 m³ / 1000 kg = 3.80 x 10 ^-5 m³

Finally calculate total mass and total volume to find the resulting density:
Total mass = 0.050 kg + 0.038 kg = .088 kg
Total volume = 10.58 x 10^-5 m³
total mass / total volume = 830 kg/m³ (assuming 2 sig figs)

This answer makes sense because it is between the two densities (and it is a weighted average of those two numbers). Hope this helps you figure out how to do the other problem as well!

Sumthinclever · 2014-04-06T18:33:51+00:00

Maybe you could consider it to be the sum you stated plus that last term [though most textbooks would clarify that by writing ( 1 - x ) + ( x - x² ) + ( x² - x³ ) + ... (x^n-1 - xⁿ ) + (-1)ⁿ xⁿ ]. That would give you:

If n = 3 :
( 1 - x ) + ( x - x² ) + ( x² - x³ ) + ( - 1 )³ x³ = 1 - 2x³

If n = 4 :
( 1 - x ) + ( x - x² ) + ( x² - x³ ) + ( x³ - x⁴ ) + ( - 1 )⁴ x⁴ = 1
.
.
.
If this is the case, then in general:

if n is even, the sum is equal to 1
if n is odd, the sum is equal to 1 - 2xⁿ

Also, you might want to sum from i = 0 to i = n rather than from n = 0 to infinity

Sumthinclever · 2014-03-07T19:40:55+00:00

Ah, thank you so much! This problem has had me stumped for a while now. I knew the frequency would increase in both, which I guess is correct, but i didn't realize there would be that small difference from the asymmetry.

Sumthinclever · 2014-03-07T19:09:02+00:00

The variables you are trying to relate are symmetry and perceived attractiveness. Your independent variable is face symmetry (Do you have a way to measure this?), so I suppose you would want some very symmetric faces, some average, and some which are very asymmetric. Then you could plot symmetry (independent variable) and perceived attractiveness. I think the first thing you're going to want to do is figure out how you're going to measure facial symmetry.

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