Recent content by profuse007

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    System of Differential equations with a singular coefficient matrix, help?

    initital condition only solve for coefficient of the Y solution. like his c1, c2 first find ur eigenvalues then find ur eigenvectors and use that egeinvector in the Y solution.
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    Help with Vector Space: Real Vector Space Explained

    hmm... for some reason, all the explanations above pull me away from the unit vector and thought of something else that made it more confusing, that's what i meant. btw, no one mention the unit vector at all, well they stated it. thanks matt and others, it was confusing quest through the...
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    Calculators How Does RREF Work for TI-89 Series Calculators?

    from what i just learned, gausian elimination(ref) is a matrix row operation reduce to an upper triangular. but the RREF or reduce row echelon form is a refine form of gausian elimination of the [A] matrix to an "identity-like" matrix to find the solution, [b](constant).
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    Help with Vector Space: Real Vector Space Explained

    a buddy of mine just explained and it made more sense and less confusin than above. the unit vector is define as the magnitude of 1 the (1,0,0) has a magnitude of 1 the (0,1,0) has a magnitude of 1 the sum of the two (1,1,0) has a magnitude of sqrt of 2, thus not a unit...
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    Help with Vector Space: Real Vector Space Explained

    thats the verbatim from the book. i do not know why S is not a vector space. please explain
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    Help with Vector Space: Real Vector Space Explained

    iono if you can use the word "subspace" on it, cause that's the next section. its the first part of the vector space, no subspace yet. these stuffs are twisting my mind...crap!
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    Help with Vector Space: Real Vector Space Explained

    -this is the beginning of vector space that i am in right now. -when you say, "also in the set," what do you mean by that? another example of real vector space example: -let S be the set of all unit vector(length 1) in R^3. then (1,0,0) and (0,1,0) are in S but the sum, (1,1,0) is not...
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    Help with Vector Space: Real Vector Space Explained

    vector space... help! i just got into vector spaces and i am really stump. okay from teh definition of vector space, it says something... "w/ the operation of mult by a number and addition. more briefly, we refer to V as a real vector space." so from a question from an exercise: determine...
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    Impulse-momentum theorem hmwk problem

    a golf club hits a golf ball of mass 0.045 kg and gives it a speed of 50 m/s. estimate the magnitude of the average force of the club on the ball if the collision last for 1.0 ms.
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    What is the center of mass location for the Earth-Moon system?

    i haven't learn that stuff yet that you just mentioned. this is chapter 6. the top of the book says grativational force and field. we use these eq. F=ma and F=\frac{GMm}{r^2}
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    What is the center of mass location for the Earth-Moon system?

    nedd help w/ this one: gravitational force the spatial average distance b/t the Earth and teh moon, center to center, is about 3.84x10^8m. the mass of the Earth is 80 times the masss of the moon. determine the location of the center of mass of the earth-moon system: A)relatives to the center...
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