Question regarding the marginal density
Suppose a point (X,Y) is chosen at random from the disk x^2 + y^2 <= 1. Find (a) the marginal density of X and (b) the conditional density of Y given X=x.
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The spring first slows the car down to rest and then launches it back in the direction from which it came but with a speed of 3.00 m/s. Find the work done by friction in this process.
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Could someone please help me explain this in a physical sense? In ohter words, why are these densities the same from a physical viewpoint?
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