Recent content by ghost34

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    Finding the mass of a sphere with uniform charge density

    Homework Statement The sphere has radius R, and uniform volume charge density P. This sphere remains stationary (levitates) when placed above an infinite sheet of paper with a uniform surface charge density u. What is this sphere's mass? Homework Equations 4/3 pi R^3 is the volume of a sphere...
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    Undergrad What is the mass of a sphere with uniform charge?

    The sphere has radius R, and uniform volume charge density P. This sphere remains stationary (levitates) when placed above an infinite sheet of paper with a uniform surface charge density u. What is this sphere's mass?
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    Does this series converge or diverge?

    Homework Statement does the following series converge or diverge? how does one determine whether it diverges or converges?Homework Equations Ʃ (n+1)/((n^3)+3n^2+5)^1/2 n=1, to infinityThe Attempt at a Solution I attempted to compare it with n/(n)^3/2, this series diverges and is greater than...
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    Graduate Is Time Reversed in Special Relativity When Moving Opposite to Light?

    Ah, I see. Thank you very much, zhermes!
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    Graduate Is Time Reversed in Special Relativity When Moving Opposite to Light?

    I've just been introduced to special relativity and time dilation. I understand that if someone in a frame of reference X bounces a beam of light vertically within two parallel mirrors, I, in a frame of reference Y moving at a uniform velocity 'U' from X, will see the light beam moving across a...