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Unformatted text preview: immediately behind the shock varyies inversely as the rst power of the time since the explosion. Find the numerical value of the exponent n . b) Consider a point explosion with total energy E tot at the center of an innite star whose density is given by = ( r /r ) 32 / 11 . This isnt a bad approximation for the envelope of a red giant. Use dimensional arguments to determine the power law dependence of radius and velocity with time. (4) Consider a cylindrically symmetric explosion which releases an energy per unit length along the zaxis of a cylindrical coordinate system into a medium of uniform density . Using dimensional arguments, determine the power law dependence of radius and velocity with time....
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 Spring '06
 rappaport
 Physics

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