Recent content by chris2020

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    Is there a simpler way to solve this Venn diagram algebra problem?

    That is exactly what I was looking for, thanks andrew!
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    Is there a simpler way to solve this Venn diagram algebra problem?

    Homework Statement I solved the problem myself but i have a question about the algebra Homework Equations n(A ∪ B ∪ C) = n(A) + n(B) + n(C) -n(A ∩ B) -n(A ∩ C) -n(B ∩ C) + A ∩ (B ∩ C) = n(A ∪ B) -n(A ∩ C) -n(B ∩ C) + A ∩ (B ∩ C) The Attempt at a Solution I knew i needed...
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    Counting Permutations for Board of Directors: 10 Members and 5 Officers

    It seems any good countable combination must have A, B or C in the president position however the other positions can permute all combinations a-j... well minus whomever is president in that combination...c) I was thinking i have 2 pools of people. Physicians (3) and non-physicians(7) so i just...
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    What Does a Three-Phase Stator Without a Neutral or Ground Connection Mean?

    Your totally correct about the phase and ground relationships. As to why you ~28 volts to car frame? Well ur right, the frame could be floating at any Fixed potential (v) and hence measuring between them would give you some potential difference and not ~28 volts. However, my estimation is that...
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    Counting Permutations for Board of Directors: 10 Members and 5 Officers

    So ur saying i should rethink solutions for b, c, d?
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    Counting Permutations for Board of Directors: 10 Members and 5 Officers

    Homework Statement Board of directors has 10 members. from the 10 members they will elect 5 officers. President, vice-pres, sec and treas A) From the 10 board members how many combinations of officers are there? B) If three board memebers are physicians, how many combinations have a physician...
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    Solving for Φ(k) in Quantum Fourier Transform with ψ(x,0)=e^(-λ*absvalue(x))

    yea i was thinking that route also but i forgot about about the even or odd shortcut Thanks!
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    Solving for Φ(k) in Quantum Fourier Transform with ψ(x,0)=e^(-λ*absvalue(x))

    Homework Statement Assume ψ(x,0)=e^(-λ*absvalue(x)) for x ± infinity, find Φ(k) Homework Equations Φ(k)=1/√(2π)* ∫e(-λ*absvalue(x))e(-i*k*x)dx,-inf, inf[/B]The Attempt at a Solution , my thought was Convert the absolute value to ± x depending on what of the number line was being...