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    Definite Integration proof

    Hey guys! I'm looking for a rigorous proof which shows that the definite integral does indeed give us the area under a curve or which proves how is a definite integral a summation process. I already know that the any given function is the derivative of the function of its area but most of the...
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    Can I do masters in aeronautics after BMechE?

    I am in my first year of ME. I want to know If I can do masters in aeronautics after my Bachelors? Any help will be greatly appreciated. Regards, Abdullah
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    Second Order DE

    since m=+/-2 y is of the form y=A(e^-2x)+B(e^2x) y`=-2A(e^-2x)+2B(e^2x) Use the given conditions. Make two equations... You know the rest. Hope this helps. Abdullah Whats wrong with the forums? It wont allow me to start a new thread. It keeps saying: The page your looking for can't be found...
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    Hybridization of compounds

    I read somewhere on net that hybridization, which is a good model for most of the compounds, is not entirely correct i.e. some molecules show considerable deviation in there molecular geometry from the predictions of the hybrid model and we only use it because it is easier way to understand the...
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    Momentum question.

    Oh my mistake. It is v=-eu. Original post edited. I asked this question because nowadays we are doing oblique collisions between a wall and a ball in mathematics. This is an example question(it appeared in exams a few years ago). Velocity of the ball=u angle which the ball makes with the...
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    Momentum question.

    Guys I'm having a little problem in undersatnding a few things: We have a wall and a ball of mass 'm'. The ball is thrown towards the wall with speed u and rebounds with speed 'v'. The coefficient of restitution is, e is 1/3. The question is to find the value of 'v'. Thats how I think it should...
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    Schools Advice on Universities in Canada for international students.

    I’m a student of A’ Level with Phys, Chem., Math, Further Math and General Paper English as my subjects. I just wanted to know which Canadian universities are not only good for their mechanical/electrical engineering programmes but are also affordable for international students (low tuition...
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    A question about dy/dx

    I'm just a little confused about dy/dx. I read that its one entity not a fraction. Can someone please clarify why is this not a fraction? According to what I know (delta y)/(delta x) becomes equal to dy/dx as (delta x) appraches zero. If delta x apparaches to zero then delta y should alway have...
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    Two Questions

    No I dont. In my opinion the KE of the ball will be used to open the valve...
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    Two Questions

    A system is developed as shown in the diagram attached. The ball is initially given a push so that it falls onto a turbine connected to generator which produces electricity. After rotating the turbine the ball fall down a narrow tube with a valve into the water again the ball rises again and is...
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    Nuclear waste.

    I was just reading about transmutation. From what I have read, it seems like a very good way to deal with the long-lived radioactive waste. I've also read that during this process energy is released which can be used to produce electricity. If thats true why not US or other countries...
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    Nuclear waste.

    Can the nuclear waste from nuclear reactors be used to make nuclear weapons? Secondly, Whats wrong in burying nuclear waste deep inside the earth or beneath the oceans? And lastly, are the hazards of nuclear waste from nuclear reactors exaggerated? Any help will be appriciated.:smile:
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    I^2=1? How can this be?

    i^2=1??? How can this be? First all I must tell you people that I have no doubt that i^2=-1 but what am I doing wrong in the following steps? i^2 =i * i =sqrt(-1) * sqrt(-1) =sqrt(-1*-1) =sqrt(1)=1?:confused: I asked my mathematics teacher but he was unable to find any error in it...
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    Mathematica Proof by mathematical Induction: Divisibility

    The question is: Prove by mathematical Induction that f(n) \equiv 2^{6n}+3^{2n-2} is divisible by 5. This is what I did: Suppose that the given statement is true for n=k Since the f(k) is divisible by 5, f(k)=5A (where A are is a constant.) Also, from the given statement...
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    Short and simple question

    What exactly is an echelon matrix? I searched the web and did find some useful results but I'm still a little confused. :confused: Thanks in advance for any help. :smile:
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    Hrlp Please

    Some one please make me understand why electrons closer to the nucleus have less energy than the ones which are farther from it. Is it because they have more potential energy? Secondly, How do we know that protons exist as particles but not as a ball of positive charge. Thanks in advance for...
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    Electrolysis of Brine

    Electrolysis of Brine.... Why does castner-kellner cell produces Na. I was always told that Na formed too stable an ion to be reduced when it is in aqueous solution even when the solution is concentrated. I myself have carried out this experiment by elecrolysing concentrated aq. Sodium...
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    Tenth planet Thread (merged)

    According to BBC some people want to name this new "planet" Xena (The warrior princess) :yuck: It sounds stupid for a plaanet...
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    Best movie scenes

    Saving Private Ryan: The first 30min are just awesome.... BraveHeart: The last few scenes... These two were the best. The "Neo vs Loads of Agents Smiths" scene from Matrix reloaded wasnt bad either.
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    A simple question

    This is an actual question from the past papers. The question is: It is stated that many forms of transport transform chemical energy into Kinetic energy. Explain why a cyclist traveling at content speed is not making this transformation and explain what transformations of energy are taking...
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    Get them across the river

    The servant has now 3 girls :devil:. So he'll definately run away with them.:biggrin: This brain teaser does have an answer. But I wont reveal it just yet.
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    Get them across the river

    Since the servant has two girls, he'll run away with them. So thats a wrong answer.
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    Get them across the river

    There are six people. They are: A king, A queen, A knight and his wife, A servent and his wife. There is one boat and they all want to cross the river. The problem is: the boat cannot take more than 2 people. Your job is to tell them a way so that they can all get across the river. Rules...
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    A very funny personality test!

    I believe 2 and 3 are for guy2 and guy1 respectively. If thats the case then atleast for me the result is OK, not very good but not very bad either. I must admit that I am narrow-minded and sometimes can feel alot of jeolousy but 75% is a bit too much. I dont take advantage of others(atleast I...
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    A very funny personality test!

    So when are we going to get our result? :tongue2:
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    A very funny personality test!

    hmm... Girl: 15 (she DOES love him) GUY1: 75 Guy2: 0 (he just explioted the girl) Guy3: 10
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    Urgent Question, must know!

    about:blank :(
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    Flemings Left Hand Rule

    Well I think when motion is produced by a current in a conduct, we use Flemings Left Hand rule to predict the direction of motion. Whereas, when motion is producing current we use FLEMINGS RIGHT HAND RULE. It’s same as Flemings Left Hand rule but this time you do it with your right hand to...
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    I need some advice

    LOL I'm just in A'levels so I dont think I will get a chance to do that. :smile:
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    Launch of space shuttle

    It was a successful launch. BTW, Does anyone the maximum speed that the shuttle reached?