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A magnetar is a type of very highly magnetized neutron star. A typical mass is M-2.5Msal, and the radius is thought to about 10km. Assume that the magnetic field B-1015 gauss. 2. Assuming that the magnetar is of approximately uniform density, estimate the total gravitational binding energy. Be sure to get the sign right. Estimate the total magnetic energy. Estimate the magnetic energy density. Express your answer in cgs units. Using Einsteins formula for mass-energy equivalence (E=mc2), express your answer from part c as effective density, in units of g cm3. Compare to the density of water. a. b. c. d.
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