Recent content by yoohyojinn

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    Distinguishing series & parallel circuit

    This is a general question. I'm having a hard time distinguishing complicated series and parrallel circuits. For example, in the picture, how do you simplify the circuit?
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    Intercepts in quadric surfaces?

    that sounds right
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    Intercepts in quadric surfaces?

    oh yes, yes, yes, you are right. I was confused with visualizing it. an elliptic paraboloid can have at most 5 intercepts. thanks.
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    Intercepts in quadric surfaces?

    Intercepts in quadric surfaces?? Homework Statement How many intercepts can an ellipsoid have? Homework Equations The Attempt at a Solution First of all, I don't understand what exactly "an intercept" means in quadric surfaces. in two dimensions, intercepts are the points...
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    Simple Harmonic Motion (displacement function)

    Homework Statement I learned that in simple harmonic motion, the displacement fuction is x(t) = A sin(ωt + Φ) or x(t) = A cos(ωt + Φ) but when do you use sine function or cosine function? can I use whatever I want whether a sine or cosine function? And what's that Φ in...