/sci/ - Science & Math

>woke up this morning with a headache
>wondering why
>had to figure this out before i made my kale shake
>realized my healing crystals didn't stay parallel throughout the night therefor the interfering frequencies must have negatively affected my brain's hormone release during my slumber
>step outside in my garden and earth for 5 minutes while reading my new book by Michio Kaku
>headache went away and i fetched for fresh kale for my shake
>spent the rest of the morning finishing What The Bleep Do We Know

>>7116737

it's dirac's notation for vectors in hilbert space, there's kets and bras.

I still lift but not nearly as much. I aim for 3x a week but school + work sometimes interferes. I hope you're still making gains m8

does anyone have any analogies for linear operators acting on kets/bras? Still trying to wrap my head around their physical meaning

partial derivatives in general are pretty sweet.

>simple
>look pretty
>powerful tool for many applications

>>7106722

ah alright. if i can find it for a decent price then i'll probably get it. Was thinking about that or Dirac's lectures on QM. I'll probably get both.

>>7106700

reply 2

>>7104684

sry

>>7104678

how good is griffiths intro to QM? Thinking about getting a copy

When determining whether a space is flat or curved, could we use topology in some cases while still finding how a tensor transforms in the region? or is differential geometry suitable for all cases

>>7094165

>taking normal vector from position vector
>no sins or cosines so no ez magnitudes
>canceling terms in my numerator before further simplifying T'(t)
>see a 2 and a +4 both in the numerator
>make it 8 instead of 6
>lost for literally a day and about to call the publisher telling them they fuck up
>mfw i see my error

everyone that did the work under an adviser that was awarded a nobel prize.

>>7081269

it doesn't have to be an elephant but just drawing circles inside shapes and filling in the corners.

i usually just do them with triangles.

>>7081266

meant to reply to

>>7081200

cant 4chan EVER

>>7081182

>not drawing infinity elephants and circling coffee/pizza stains on your homework

i loved me some taylor/mac series. deriving a power series was pretty cool

free body diagram OP

>this thread is getting replies

oh shit i used to watch his topology lectures. dude's awesome

>>6977164

look up center of percussion too if you want to understand center of mass on strings/rods when you have a pivot point with a force acting perpendicularly.

might help in general

>>6977141

the string is equally dense all throughout so you can do L/2 for it's center of mass.

>free body diagram for both masses
>write your forces (x and y direction) for each mass
>assuming string is straight and pulley is "massless", both strings will have the same tension
>friction is the frictional constant multiplied by the normal force of the object
>keep in mind you're on a ramp so you're gonna have to multiply your force by the cos of the angle

>>6922130

yeah plus it's physics so the prof will understand

7:17

gud damnit i have class at 8 and i already have to deal with shit traffic

>>6891244

with that shit just be more calm throughout the test and re-read over it SLOWLY twice after everything.

i always see simple mistakes when i get my tests back because i didn't bother going over it. next thing you know i'm solving an integral entirely wrong because i didn't bring a negative or something

>>6891230

that's been happening to me this entire semester. doesn't help that she phrases the questions in a way that doesn't match the homework, but that's not a good enough excuse to get the problem wrong.

practice the material more