Recent content by spratleyj

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    Linear Transformations and Basis

    Homework Statement Show that if { v_1, ... , v_k} spans V then {T(v_1), ... , T(v_k)} spans T(v) Homework Equations The Attempt at a Solution So we know that every vector in V can be written as a linear combination of v_1,...v_k thus we only need to show that {T(v_1)...
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    Who Decides Airline Schedules and Prices?

    I’m currently a student who is interested in how airlines come up with flight schedules/prices, etc. Do they typically have people in-house who make the decisions? Do they hire outside firms? Or do they merely buy a computer program which does it for them? Also, I would be interested in...
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    Undergrad A Layman's Question of the Big Bang

    As others have said what happened before the Big Bang is still a mystery, also there are many common misunderstandings about the Big Bang, like a) it was a "Bang" or expolsion b) that there was a small greatly condensed piece of matter, etc... But there are some contradictions with the laws of...
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    Undergrad Absorb all sort of matter and radiations and still not releasing out?

    I just quickly browsed through the previous replies, but I believe there are two possible answers to this question: 1) As others have stated the escape velocity in a black could be infinte, because of the desinty 2) We now believe that black hole's do radiate (through Hawking radiation), also...