yeah sorry me again.
so i’m evaluating the definite integral of
3
integral xe^(x/2)
0
i let u be x and dv be e(x/2)
so
(1/2)xe^(x/2)-(1/2) integral of e^(x/2)
so then i get
(1/2)xe^(x/2)-(1/4)e^(x/2)
but everytime i plug in my numbers i keep getting something other than 12.69
which is what the book has
Any tips for chemistry? I know it’s suppose to be easier than physics, but I’ve heard a lot of complaints about o.chemistry. I don’t know why I suck at chemistry.
Nvm I realized the error of my stupid stupid ways
in high school, chemistry was easy as fuck. half of it is just stoichiometry. in college? not so much. i found physics significantly easier than general chemistry, the fact that i didn’t go to class was probably a factor but still. chemistry is more about memorizing shit whereas physics is more about understanding shit…like anything though, it really depends on your strengths.
If you can’t do conversions, learn…
If you skip over conversions because you don’t want to bother with them, drop, because you won’t pass…
Organic Chemistry has little to no math, it’s quite different once you make it there lol…
Totally true haha. I got lazy at the beginning and didn’t brush up on my conversions, and now its coming back to bite me. Especially when you start getting into the Mole Concepts.
stuck on this physics problem.
so an object falling from to the earth travels 1/4 of it’s distance in the last second.
from what distance was it dropped?
i’ve been trying to find other places online trying to understand how to solve it ,but i’m just not getting it.
i hate how bulma is laughing at how easy it is for her.
Is this a homework help thread? If it is then that’s one thing, if not then you should find some classmates or a tutor.
You made a grammar mistake. I guess that’s supposed to say “from rest.”
In addition to what I said above about rigidly defining EVERY VOCABULARY WORD THAT YOU COME ACROSS in your Physics class the most simple approach to solving a problem is thus: Figure out what you know (given), figure out what the problem is asking you to, and find the relation between the two. In this case it’s pretty simple: The object is falling so its acceleration is governed by gravity, it tells you the duration of time that you’re supposed to consider, and you’re supposed to figure out the total distance traveled. 2 knowns, 1 unknown, Bulma knows.
I don’t want the answer that’s not gonna help me come test day.
Just to understand the material as best i can
I try and look through my book and other websites before posting here.
i know it must get mad annoying.
it’s just my second week in this class.
once again i’m sorry.
honestly i find it really embarrassing to always ask for help understanding certain situations in this thread, and try post here as humbly as i can.
I think it’s okay to ask for help. Try to understand the concepts first. Physics require an insightful understanding with critical thinking as opposed to “grinding” in other disciplines. What might help you is to refer to other source material such as the MIT open courseware, and other perhaps better written books.
As far as your homework problem, try expressing the fallen distance as a function of the acceleration and initial drop distance. You’ll have to make assumptions regarding other factors.
Be tenacious. Don’t give up or stop thinking about a problem because of frustration and also don’t be afraid of proposing a solution that might not be the right answer. Don’t be afraid of being creative either.
Say it falls from height H, and takes T seconds. Can you express its height as a function of time, h(t)? What’s h(T-1) then? How does this relate to H? How are T and H related?
There are a bunch of kinematic equations, but you only need the basics, and I agree that you probably shouldn’t try to memorize too many. I found it easier to solve for T and then use that to get H, but I don’t think it’s too hard to solve directly for H.
As for being easy for bulma, there is a nice way of cutting out some steps to solve very quickly for T. Under constant acceleration and starting at rest, distance traveled, d, from the drop point is proportional to the square of the time taken, right? So d(t)=kt^2 for some k. Now relate d(T) and d(T-1).
I second Tekno Virus’ advice to stick with it. I started to do this last night when I was too tired and kept making stupid errors. Then I slept, woke up, and did it right away. It’s ok to step away from a problem for a while.
Gonna follow this thread. Taking calc right now, not sure how I’ll do in calc 2 later. Also taking a logic class, currently learning about sound and unsound arguments.
For logic class 
I couldn’t have been more wrong, topology is awesome.
what a difference 5 months can do.
Honestly, the way math is taught here (and I guess in other countries?) is just memorize a pattern and regurgitate. I was talking to this intern, he didn’t know where log came from or the exponential function and how it affected physics and such. He also has at least a 3.75 GPA.
GPA don’t mean shit, alot of people take classes to pad that shit out…
Log function is something you should know by algebra smh…
But they don’t teach us where ‘e’ comes from and how we defined log, it’s just some mysterious function on the calculator that relates to exponential functions.
And I have a feeling most of the teachers don’t know as well.
GPA means whether or not you’re making bank after you graduate. Many people have preconceptions about you depending on what your gpa is. 3.2 means you’re a hands on and 3.9 means you’re analytical. It’s all bull but it affects your immediate future.
Actually, 3.5 is the cutoff to a lot things relevant now.