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Mathematician here, just took modafinil for the first time ever (1 tablet=200mg), well, by "just took" I mean about 35 minutes ago.
Pulse right after eating the tablet: 74bpm
Current pulse: 72bpm
I masturbated just after taking the tablet, and subjectively feel like i got a stronger, longer-lasting burst of euphoria than usual after ejaculation. However, that could be the placebo effect.
I am now going to review my math deck in anki (105 cards due), will report back after.
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Why are humans so high maintenance compared to other animals? I mean, I have a dog, I almost never give him showers, trim his claws, brush his teeth, etc. yet he's healthy as fuck. Humans can't get away with this. We start getting fucked up skin conditions, our teeth will rot out and we can't eat, we get nails that get to long and brake easily causing a ton of pain. Is there an evolutionary reason behind this or am I just exaggerating how important hygiene is for humans?
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"The cart is rolls frictionlessly on the table. It has a mass of 1kg. Attacthed to it are 2 strings, that go through two frictionless sheaves. The weights have masses as in the picture.
a) How large is the acceleration of the cart?
b) How large is the tension in the strings?
c) We replace the cart with a box that also has a mass of 1kg, it then accelerates with 1.5m/s^2, find the friction force between the table and the box."
I tried doing this one, and got every single answer wrong, even though I thought I knew how to do it. This is how I did it:
a) The force pulling the cart to the left is equal to the force pulling the weights down since the cart is attached with a string through a sheave. The force pulling left is equal to: F=1kg?10m/s^2=10N and the force pulling right is F=2kg?m/s^2=20N, therefore the resulting force is 10N to the right. Since the cart has a mass of 1kg it accelerates with 10m/s^2.
b) The tension on the left string is 10N (from above) and on the right one is 20N (also from above).
c) This one I just have no idea how to do.
The answers given in the book are: a) 2.5m/s^2, b) 12.5N and 15N, c) 4N