Unformatted text preview: of “empty” space? 3. How much energy did it take for the Death Star to blow up Alderaan? 1 Let’s make an estimate. (a) Use dimensional analysis to estimate the gravitational binding energy of a planet of mass M and radius R . Estimate the gravitational binding energy of Alderaan, assuming it was similar to Earth. (b) How much matter would the Death Star have to convert to energy (by E = mc 2 ) in order to blow up Alderaan? (c) Estimate the size of the room in which the matter was stored. You will need to assume something about the density of the matter; explain your assumptions. Now do you understand why the Death Star was so big? 1 If you don’t get the reference, ask around! 1...
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 Fall '08
 Keeton
 Atom, Mass, Work, Alderaan

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