3 and 4 should be. How exactly did you use the the formulas?
What if the rocket is struck by a micrometeorite storm during correctional thrust?WldctARCHe wrote:
If the gas is expelled perpendicular to the rocket then it doesn't matter. Set your coordinate system to make the gas the horizontal axis and the path of the rocket in the vertical direction. Thus this means you only have to take the components of the rocket after gasses are expelled.
edit: or what if the astronaut made a miscalculation when correcting for trajectory and fired the thrusters two microseconds longer than stated in the story problem?
Last edited by unnamednewbie13 (2010-03-24 23:41:08)
Just for neatness if you use it makes the powers a lot easier to read
alsofor different velocities, etc to...
it's just im a bit slow and cant read all these funny symbols XD
Code:
[sup][/sup]
also
Code:
[sub][/sub]
it's just im a bit slow and cant read all these funny symbols XD
Last edited by presidentsheep (2010-03-25 14:22:12)
I'd type my pc specs out all fancy again but teh mods would remove it. Again.
it isn't mastering physics is it?Bevo wrote:
I don't have the answer, it's a submit form online with multiple tries.
Last edited by Peter (2010-03-25 16:59:48)
noPeter wrote:
it isn't mastering physics is it?Bevo wrote:
I don't have the answer, it's a submit form online with multiple tries.
Speaking of homework and help, anyone ever try this:
http://www.tutorvista.com/
http://www.tutorvista.com/
.107kg block released from rest, falls down 41.4 degree frictionless incline. When it has fallen a vert dist 1.93m, a .024kg bullet is fired into the block along a path parallel to the slope of the incline and momentarily brings the block to rest.
find speed of bullet just before impact
okay, so I found the speed of the bullet by measuring the mgh, converting it all to KE, finding the velocity of the block, finding the momentum of the block, and then finding the momentum of the bullet and dividing by the bullet's mass.
The second part of the question is "what velocity must the bullet travel at to move the block back up to the starting position?" So I used the original energy that I found (2.024) and added it to the potential energy of the block at the same point with a bullet stuck in it (2.477), and then used that energy to be equal to the energy of the bullet at impact.
Which did not work.
I also tried using 2.477J as the energy needed to bring it back up to it's starting point, and then adding that velocity to the other velocity I got, but that was also unsuccessful.
Ideas?
find speed of bullet just before impact
okay, so I found the speed of the bullet by measuring the mgh, converting it all to KE, finding the velocity of the block, finding the momentum of the block, and then finding the momentum of the bullet and dividing by the bullet's mass.
The second part of the question is "what velocity must the bullet travel at to move the block back up to the starting position?" So I used the original energy that I found (2.024) and added it to the potential energy of the block at the same point with a bullet stuck in it (2.477), and then used that energy to be equal to the energy of the bullet at impact.
Which did not work.
I also tried using 2.477J as the energy needed to bring it back up to it's starting point, and then adding that velocity to the other velocity I got, but that was also unsuccessful.
Ideas?
I just tried converting momentum into Force times time, found the time it took to go from shot to stopped (.9489s using a sin of grav and finding the length of the hypotenuse), used grav as my force again and the total mass as my weight, found that momentum to be .8056
added it to the other momentum of .658, then divided by the mass of the bullet and got 60.98m/s. but i'm hesitant to enter it again, i've already lost a ton of points on this stupid HW due to a multiple choice question, and i've already used like 4 guesses on this one.
ed: 60.98 was correct, i'm a nub
added it to the other momentum of .658, then divided by the mass of the bullet and got 60.98m/s. but i'm hesitant to enter it again, i've already lost a ton of points on this stupid HW due to a multiple choice question, and i've already used like 4 guesses on this one.
ed: 60.98 was correct, i'm a nub
Last edited by Bevo (2010-03-30 19:57:51)
why dont you fuckers ask some history questions every once in a while
Tu Stultus Es
Why are nuclear weapons a benefit to society?
because it has kept the amount of large direct conflicts involving major world actors to a minimum
if nukes never existed we would have had another major land war. not regionally isolated conflicts involving proxies and non state actors.
if nukes never existed we would have had another major land war. not regionally isolated conflicts involving proxies and non state actors.
Last edited by eleven bravo (2010-03-30 20:05:33)
Tu Stultus Es
Thank you. Do want to articulate that is 15 pages and spin it so that my obdurately anti-nuke professor likes it?
ok how bout going at it like....MAD ensured a peaceful solution to the cold war.
Last edited by eleven bravo (2010-03-30 22:15:37)
Tu Stultus Es
Then he'll think I'm saying nuclear abolition movements during the Cold War were a bad idea. That would contradict the book he published in 1982.
I'm going to engender instant respect by using the only quote appropriate for a nuclear weapons paper (Oppenheimer), which suggests nukes are bad to those who are inclined to interpret it that way, but I don't think one brilliant opening will compensate for a paper that says nuclear weapons are good.
I'm going to engender instant respect by using the only quote appropriate for a nuclear weapons paper (Oppenheimer), which suggests nukes are bad to those who are inclined to interpret it that way, but I don't think one brilliant opening will compensate for a paper that says nuclear weapons are good.
Last edited by nukchebi0 (2010-03-30 22:28:36)
1982
you could say that those movements were also part of the reason why nuclear weapons were not used in the first place. a nuclear weapon has more coercive influence unused as opposed to engaged. the high sentiment against the among the general population kept the powers itching for war in check. your prof should really get an updated book for his class. I just found out my prof wrote his book published in 2006 and I think thats the oldest text I have.
Tu Stultus Es
I mean, he hasn't changed his viewpoint since 1982. Everything he said then, he'll say now. I also have his book from 2007, and all it does is discuss the need for removing them. My less than anti-nuke IR professor told me that it was recommended to him as "the ultimate argument for abolition". The guy is 67 - he is past the point where he would be open to thinking they were positive. I've decided I'll just frame it as benefits vs. costs, given by certain theorists vs. abolitionists, and then conclude the abolitionists are probably right, at least from a theoretical perspective.
or how about you don't suck your old professor's wrinkly dick and come up with some original thought and show that you have genuine initiative to synthesize ideas and evaluate hypotheticals in your research. you remind me of the figure from good will hunting, the smarmy cunt in the bar that actually knows nothing: you pay all that money to go to a university so you can regurgitate someone elses' opinions, like a sycophant, from a book that i could get at the library for free? how about actually developing your own intelligence and intellect? university is supposed to be the independent stage of learning where you do things for yourself and stop simply performing tasks for the sake of jumping-through-the-hoops to get the best grades. give his mind something interesting to read instead of performing the usual fellatio routine that every shit-nosed stuck-up little undergraduate has performed on him since 1972.
libertarian benefit collector - anti-academic super-intellectual. http://mixlr.com/the-little-phrase/
It's really appealing to put legitimate effort into something that won't be viewed favorably because it disagrees with the entrenched views of the professor. I'll save the academic idealism for an assignment that isn't due on Thursday, and given in a class I can actually respect.Uzique wrote:
or how about you don't suck your old professor's wrinkly dick and come up with some original thought and show that you have genuine initiative to synthesize ideas and evaluate hypotheticals in your research. you remind me of the figure from good will hunting, the smarmy cunt in the bar that actually knows nothing: you pay all that money to go to a university so you can regurgitate someone elses' opinions, like a sycophant, from a book that i could get at the library for free? how about actually developing your own intelligence and intellect? university is supposed to be the independent stage of learning where you do things for yourself and stop simply performing tasks for the sake of jumping-through-the-hoops to get the best grades. give his mind something interesting to read instead of performing the usual fellatio routine that every shit-nosed stuck-up little undergraduate has performed on him since 1972.
And honestly, you've never done this? Have you spent your entire university career contriving meaning out of obscure literature?
Last edited by nukchebi0 (2010-03-31 00:11:03)
i recognize that studying any discipline instructs you in disciplinal-specific ways and life-generic ways; the study of 'obscure' literature has helped me to ostensibly stumble upon and realize many lessons and aphorisms pertinent to every day real life, as well as serving the practical current purpose of academic work. i think everybody can extrapolate deeper meanings and 'real' knowledge (in the epistemological sense) as well as equipping them with skills and facts of an academic/vocational study. so that insult really falls far below the benchmark of 'intelligent remark'...
i have never read one of my professor's books and regurgitated it to score high-marks, no. and you're not the only person on this forum taking lessons from world-leading academics and leader's in their respective field(s). i have the self-awareness to know that the process of my education involves, certainly, close attention to and a respect for the opinions and precedents that come before me- but also crucially involves a further process of integrating and filtering through that to form my own, personal ideas. my essays express these, and are thus graded well for it. repackaging current-knowledge and existing research in an intricate, verbiose web of academic pomposity and structured nothingness is not what im paying thousands of £'s for. thanks.
also, who the fuck brags about an academic work being 7000 words long? welcome to each working-week of any proper department.
i have never read one of my professor's books and regurgitated it to score high-marks, no. and you're not the only person on this forum taking lessons from world-leading academics and leader's in their respective field(s). i have the self-awareness to know that the process of my education involves, certainly, close attention to and a respect for the opinions and precedents that come before me- but also crucially involves a further process of integrating and filtering through that to form my own, personal ideas. my essays express these, and are thus graded well for it. repackaging current-knowledge and existing research in an intricate, verbiose web of academic pomposity and structured nothingness is not what im paying thousands of £'s for. thanks.
also, who the fuck brags about an academic work being 7000 words long? welcome to each working-week of any proper department.
libertarian benefit collector - anti-academic super-intellectual. http://mixlr.com/the-little-phrase/
Honestly if a professor grades low for not agreeing with them then they shouldn't be teaching..
apparently the fundamental aspects of higher-level university teaching is missing at yale, where only the promotion of current institutional-ideological hegemony is wanted.
Last edited by Uzique (2010-03-31 00:45:23)
libertarian benefit collector - anti-academic super-intellectual. http://mixlr.com/the-little-phrase/
I only just noticed his location said New Haven. Is it just his sig, or does he seem to go on a lot about Harvard? I assumed he went there.
harvard is gay
everything i write is a ramble and should not be taken seriously.... seriously. ♥
It wasn't intended to be as such, obviously. I'd never gotten the impression that literary analysis was an academic field of significant rigor, but that was obviously based on my high school and limited college experience. I'm glad to see that you have, and it'll be duly noted when I pass judgments on courses of study.Uzique wrote:
i recognize that studying any discipline instructs you in disciplinal-specific ways and life-generic ways; the study of 'obscure' literature has helped me to ostensibly stumble upon and realize many lessons and aphorisms pertinent to every day real life, as well as serving the practical current purpose of academic work. i think everybody can extrapolate deeper meanings and 'real' knowledge (in the epistemological sense) as well as equipping them with skills and facts of an academic/vocational study. so that insult really falls far below the benchmark of 'intelligent remark'...
How did you extrapolate with "regurgitating a professor's book" from "writing a paper that kind of agrees with the professors viewpoints"? I'm not that desperate or pathetic.i have never read one of my professor's books and regurgitated it to score high-marks, no.
I'm quite aware of that. I'm also quite aware that this class is not in my main course of study, the paper is due in two days, and I have to care more about grades than you do because I'm not already set financially for life. And, as noted, you are kind of exaggerating the academic laziness: original insight exists, ideas are linked, so on and so forth. History/IR theory inherently requires more acknowledgment of previous academic work, I'd think, because it's a field strongly predicated on communal knowledge and well-established core tenets.and you're not the only person on this forum taking lessons from world-leading academics and leader's in their respective field(s). i have the self-awareness to know that the process of my education involves, certainly, close attention to and a respect for the opinions and precedents that come before me- but also crucially involves a further process of integrating and filtering through that to form my own, personal ideas. my essays express these, and are thus graded well for it. repackaging current-knowledge and existing research in an intricate, verbiose web of academic pomposity and structured nothingness is not what im paying thousands of £'s for. thanks.
Wasn't intended to be bragging, but if it is construed that way, it'll go. I added a couple of qualifiers to ensure accuracy of the second statement, too.also, who the fuck brags about an academic work being 7000 words long? welcome to each working-week of any proper, upper-level, humanitiesdepartment.
Yale isn't perfect; neither is Oxford. With that said, you are simplifying to the point of fallacy.apparently the fundamental aspects of higher-level university teaching is missing at yale, where only the promotion of current institutional-ideological hegemony is wanted.
Unfortunately, tenure is bad thing. I have no guarantee that he will, but I've been told by a former and current professor to tread lightly.RTHKI wrote:
Honestly if a professor grades low for not agreeing with them then they shouldn't be teaching..