harthram
52701
1356
24
The test will have 100 problems, but I will only grade three random problems and base your entire grade on that.
Jun 17, 2024 7:49 AM
harthram
52701
1356
24
The test will have 100 problems, but I will only grade three random problems and base your entire grade on that.
NooPogodi
I will literally never need this. Still going to save it though
SacrificialClam
It's all relative
trinxter
You need that drive that preserves them for your next incarnation.
NooPogodi
I hope that perhaps one day I will have the knowledge required to understand this shite
ASongOfPissAndFarts
One day, your kid, or a family member's / friend's kid might struggle with physics. You might remember this post and share it with them. The kid becomes a well known physicist. Aren't you glad you saved it?
ThinkThisOut
Story time! I randomly saved the “here comes the smolder” meme thinking I may be useful one day. The very next day at a family event a youngling was describing it to an oldie and it just happened to be my last saved image. Now anyone could google it but having in images showed the relevance. Good times
mrd0dman0s
Nah, I'm good thanks.
amanofmellowcharacter365
You've passed the true test.
dripstone
I remember the ideal gas law cause I'm a pVnRT.
RandallKavanaugh
Way ahead of you!
whitebbwolf
Gippo53
I think I'll write them on the palm of my hand to secretly consult them during the exam ...
nemocares
Odds are you'll be given a printout of it all for the exam. The question is if you know how to use them.
munchabeexodus79
I am a fish
FreeDadHugs
"Why don't you hand your body in and let them mark that?"
B166ERMaximus
Already learned it, already forgot most of it. As an engineer, I’m happy to look this sort of stuff up as needed.
thotterpop
If you can look it up without having to spend a few days learning what certain symbols mean and how it's supposed to make sense, then yeah, you're probably fine.
Although, if you find yourself wondering why your result is a volumetric flow rate, when you were trying to solve for a temperature...
Destro24
Same.
VitaminJay
My SIL is a civil engineer. She did all the hard work grinding these numbers, now she just punches numbers into very specialized software and has a broad knowledge base to work from.
petpet3d
The fact that you did that when has set your brain up for the critical thinking needed to do your current job, even if you don't use those skills exactly now.
chewybrian
wadatahmydamie
chewybrian
Catnip is a hell of a drug
kilanos
Fun fact! None of the equations in the meme are in the above image, because the meme is all about geometry.
Bigblackdick69
LeftRightThere
42
theysaidIwasStackable
I used to know all of this, now its all gone :'(
DentonTheBear
You lost me at velocity
dripstone
I used to know a third of this stuff. Still have PTSD dreams about exams cause of it. Now I never ever use it.
trinxter
Relativistic and quantum is getting pretty out there. But still it is mostly a question of understanding, not memorizing.
hnngh
billyrayvirus
this shit gives me ptsd
Nim449
same. for real.
Wapusk
Wait! Why am I only wearing UNDERPANTS?!
cre8majic
My dad was a lifelong eng professor , said he didn't want to see if you knew it, but if you knew how to USE it, application vs just memory
KetchupAndCheese
This used to be my recurring nightmare. Until one time, I dreamed I was in class, was just handed this, and then I glanced over to see the entire cast of the Avengers stressing out. Dr. Strange then leaned over to me and asked "Do you know what's on this test? We haven't been in class all year either!" I woke up laughing, and I haven't had the test dream since then.
lapus
It took me forever to memorize the unit circle.
Doggowhisperer23
donorkort
I still sometimes have nightmares about high school exams even though it's been 10 years since I finished university.
UrbanPlatypus
I still remember the physic question I got wrong cos I couldn’t remember the formula for sound dispersal… 20+years ago
AthosUnderPressure
Math is a language. Once you know how to move stuff around it all becomes easier. Also.. no one ever expects you to memorize them...
TI99Kitty
My high school geometry class has something to say about that...
nemocares
This ain't exactly high school geometry.
Yakeshinu
Yeah, but at this level, it's not mathematics either. Well, I guess you could go with applied mathematics = physics, applied physics= chemistry, applied chem = bio, etc.
But yeah, in general that's how things function.
The fun bit about science is that we don't stop pushing.
And there is provable shit out there that we can't explain!
And a lot of dead ends.
DV8fromNormal
I’ve already got this saved to my Google classroom from 4 years ago. But then I used to teach physics.
Woogyface
the problem with these are that there is never a legend. you NEED to know what each letter stands for and what these math symbols mean. this picture means nothing to someone who doesn't unstand advanced math and advanced math users don't really need this because the internet exists. Add a Legend to this and it would be more helpfull
Memaleph
And those f*cking hypotheses. It's not applicable everywhere. Take those Maxwell equations, they are only valid in vacuum. And specifically in that case, units are also needed as some non-SI units (but heavily used) include the constants (like gauss and oersted).
These summaries are only useful to the one who wrote them.
nemocares
It isn't trying to be helpful to people not taking the physics course it's from, and if you don't know advanced math that isn't a course for you. As for those who do know the math this can be very useful, since it collects everything in one place so they won't have to search the internet for it, they probably won't have internet access during the test (cheating issues) so they get this instead, and since it tells them what may be on the test and thus what they need to study.
greennight
Basically could be written in Klingon and I'd understand just as much.
whatsisname
If seeing the formula isn't enough to jog your memory into remembering what the symbols are, you don't know the concepts well enough to use them.
KHLP
That’s what I was going to say!… 👀
tetondons
"i" stands for "Amps"
todayok
No, it stands for current.
madvin
That's a lot of formulas... No need to know all of them by heart, the most important is to know how to retrieve and to use them.
derekjohn
When you think of the accumulated lifetimes of work that went into creating these formulae, it's almost like glimpsing infinity.
KentKnifen
I survived my calculus class YOU CAN'T HURT ME ANYMORE
TheCarolingian
OK, I've read it...ask me three random questions...I got this!
Yakeshinu
You have 1L of 2 Normal sulfuric acid. How much do you add to 500ml of water to get 0.5 molar sulfuric acid? ;)
TheCarolingian
Just enough...but not too much. Too little isn't enough either. So, just add the right amount, and Bob's your uncle, job done!
Yakeshinu
Yakeshinu
Sorry, I was attempting a joke; the above are all physics, l was attempting science humor by proposing a chemistry problem. :D
CoinedWatcher
What is your name? What is your favorite color? What is the airspeed velocity of a swallow?
Yakeshinu
What do you mean? An African or European swallow?
017renegade
In my physics exam they let us use whatever printed encyclopedias we wanted. The idea wasn't to show that knew the formulas - they wanted to see if we understood how to use them to solve complex problems with the available tools.
tantallous
meanwhile i had a chem teacher in college that insisted we all memorize the periodic table, completely defeating the point of having a table
DavidBrooker
And, indeed, the difference between an equation and a formula - in physics, anyway - is that an equation shows a general physical relationship about a particular quantity, whereas a formula is an equation that has been re-arranged to isolate a variable (often under specific assumptions and conditions, making them less general). An exam based on using formulae misses perhaps the most important aspect: an understanding of those assumptions and conditions and their corresponding limitations.
DavidBrooker
An example from the above sheet: entropy is defined based on differential changes of heat, but the formula above is given in finite changes in heat, and so we've assumed something about heat transfer. Moreover, entropy is a state function while heat is not, so the formula has made a pretty big assumption about path dependence.
NYC2BrklynCubz
Ideal for real world
mostlyjustheretoupvotefunnycomments
Can confirm.
InkyBlinkyPinkyAndClyde
That's how it was in my electrical engineering course. Actually we usually got to make our own cheat sheet, which I liked because it forced you to identify what was important. It was a good review method. In first year I would fill the cheat sheet completely but by fourth year it was minimal with lots of blank space.
Yellowchopsticks
People also need a basic math review, I've graded open book tests of math heavy courses, and so many students just don't understand order of operations, or at least, don't understand how to put it into their calculators.
mebe21
My physics professor would give us a sheet of equations as the first page of every exam. Every equation we needed for the exam was on that sheet. It was up to us to know how and when to use them though.
VeinyFleshTrumpet
Wow.. that’s actually incredible. Imagine teaching people for comprehension rather than memorization. That needs to be FAR more common
elitedbag
I was a physics teaching assistant in grad school. The students would try to commit all possible permutations of an equation to memory. I tried so hard to tell em they just needed maybe 2-3 equations and as long as they knew how to use em that’s all they’d need. They didn’t care and wanted to do it the hard way, I guess.
astralfields
In German exams, you just get a formula handbook which contains any and all formulas you might possibly need, and a graphic calculator. At that point in your educational career, learning formulas by heart or doing regular arithmetic doesn't do anything worthwhile anymore. It just makes you work a bit faster. Besides, in any kind of real-world situation you will be able to look up formulas as well and you'll use a calculator or computer for arithmetic, so it's more realistic anyway.
ThePunishersVengefulBrother
Same for my engineering program.
XanderCorsaj
Mine too. I have an older friend who had to memorise the periodic table for chemistry. By my time, it was showing that you knew when and where to use equations etc, in physics. Had a maths exam that was butchered by two conflicting criteria depending on what school you attended. So there were questions that one school had been taught and others hadn't, and vice versa. I didn't know the 'proper' technique for a problem, but figured it out with logic n wrote how I did it. Still got the points.
sadurdaynight
Had a stats class where prof was going all-in on how to do hypothesis tests, calculate it all from scratch, how to do it on the calculator. So, for the tests we all focused on that. Get to the test.. he had values already calculated, and would ask "ok, given these values, what decision wuold you make regarding..." Folks bombed HARD. B/c they tuned-out his explanations of WHY you'd use the stuff, and just focused on how to calculate it.
kimst
I would assume this is the case in most of the world, atleast on an university level.
rusrsdude
Yeah, It entirely depends on how the questions are formed, though. If they give you questions like find the force needed to blah when v= 15m/s and g =9.81m/s.. then formulas are gonna help a lot since u just plug and play, but if they give you a proper word question without overtly stating the actual variables, the formula sheets are fine to have.
Shinikitty
I majored in physics and absolutely this. One of my early classes with basic light and optics it was multiple choice and we had all the base formulas. The question on the test wasn't copied right so none of the answers were right in the multiple choice. I spent 45 minutes on the one question deriving the right equation from the base formulas to prove what the right answer was and took it to the professor. He used my work as the example of what he wanted us to learn how to do from his class.
Shinikitty
Same instructor in my electricity and magnetism class gave us our final. We had two weeks to complete the test. You could use any resource confir with each other etc. Just had to show the work and be able to explain to him your process in a short one on one interview. We had 2 questions on the test. Hardest test I have ever taken.
thegrouchohandleisunavailable
In certain hands on high-end vendor network lab exam you have access to the full documentation, without global search, with on-page search. If you need to stop second-guessing yourself, or make the difference between a pass and marginal fail, that works. If you need to read it to pass, you're fucked. For reference, the exam is 8 hours long.
nero4ty2
My chemistry teacher in hs always had open book tests, they were always the hardest
NooPogodi
That's fire tests should be
OffStageSpring9
Would you like an extinguisher?
NooPogodi
How** wow I'm such a disappointment
Myowngrampa
I think you may have failed your test
DoctorAvatarTheLastOfTheTimeBendingAirLords
If you ever have an open internet test, you're fucked. It's like, "Go ahead, nothing will save you"
livingonagiantfireball
Im a hvac technician, i repair refrigeration and heating device, im finishing my apprenticeship atm and i have to learn about a 1/4of the formula here, its stupid... school is dumb, i will never need those formula ever again but for my exam...
HandoB4Javert
+1
Ravendarksky
I spent hours copying the formulas I couldn’t remember onto my arms and ruler only to turn up on the day and find they’d changed the rules and there was a copy included in the test.
KerryCoder
Damn right! They should let you do that in physics AND math. I still can't remember what all the formulas around 1/tan(theta)^2= what
ElChupaNuggra
According to every teacher I've ever had, your professor is a terrible teacher who flaunts an ignorant and dangerous teaching method. Memorization is paramount to learning!!! Despite the fact that in almost ALL situations where you are required to apply the knowledge you will have books, or fact sheets to ensure you're doing processes properly, and you're just wasting time on an outdated methodology that the ability to memorize is somehow tied to intelligence :(
zagibu
And these tests are much harder. Anyone can learn formulae by heart, but understanding what they do and how to combine them to solve a problem is what physics is about. Like you see a ball falling outside your window for exactly 1 s. The window height is 1 m. How high above the window was the ball let go?
ballsoutflyer
how about impact force and depth at rest? Are we to include that aswell?
zagibu
You can if you want to. Might give you bonus points. But better save it for when you still have time at the end.
alcaray
I can't learn formulae by heart. But I can comprehend and apply concepts.
TinyLiehon
You'll end up knowing them by heart anyway if you need to practice a lot. Saves a bit of time each time
DoctorCaptainProfessorAmazing
This. This demonstrates an understanding of what you're doing rather than rote memorization of equations.
uououououo
Jokes on you my engineering exams had both a problem solving aspect AND rote memorisation of equations. Also rote memorisation of units and conversion rates between units. I fucking loathe the bullshit that is mmhg. Bullshit like giving me pressure in mmhg for a fucking pipe and expecting an answer involving both PSI and flow rate m^3/s. I fucking hated my professors.
uououououo
(2/2) I ran into the problem that I physically could not write fast enough for my exams. My hands would be in a great deal of pain afterwards as well. And my handwriting would be atrocious. But we weren't allowed to use laptops either because reasons.
zagibu
That is some serious bullshit. Sounds like a hidden numerus clausus.
uououououo
It could have been. I managed to pass despite it but I know the pass rate was like 20% or something.
SageOfDepth
For those wondering; we know that it accelerates linearly due to gravity being constant so it would have to be travelling at an average of 1m/s over the entire interval of the window. Indeed, halfway as it passes the window, it must be travelling at exactly that speed.
SageOfDepth
Because of how rapidly one accelerates to 1m/s in freefall, we arrive at the conclusion that the ball would have to be dropped from *the given window* at a height of about 9.81cm above the base. OP dropped the ball.
zagibu
Also, I didn't specify on which planet. Remember what Einstein did. If the math doesn't check out, one of the base assumptions must be wrong.
zagibu
This means you made the assumption that the ball was dropped from a frame of reference with 0 velocity relative to the window, which is a fair assumption, but not the only possibility. If the ball dropper was traveling in the opposite direction of gravity's pull, there is a second solution.
kilanos
You ALMOST nerd-sniped me. Are we assuming no air resistance or including it?
leperoutcastunclean
Assume a spherical ball/
zagibu
If air resistance was asked for, there would be more specifications about the ball.
DoctorCaptainProfessorAmazing
Off in the distance there's a flag indicating an updraft of approximately 8 knots.
quadraspaz1
How far distant? Is it also spherical?
Myowngrampa
1 distance and it's a 2D shape
ICutRocksOnYoutube
That's wind resistance. Air resistance at sea level is a static number.
agonarch
For a given atmospheric pressure sure, but are we even assuming an earth standard composition atmosphere for density along with that 1013hPa?
Yakeshinu
I've got to assume not. That would require a LOT more information.
TinyLiehon
Answer is about yay high
ICutRocksOnYoutube
with the numbers included, factoring in air resistance is negligible.