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Unformatted text preview: π / 3) (6378 x 10 5 cm) 3 = 1.84 x 10 6 g/cm 3 5. Radius = 0.1 m Density = 10 6 g/cm 3 Volume = 4/3 π R 3 = 4/3 π (10 cm) 3 = 4.2 x 10 3 cm 3 Mass = Volume x Density = (4.2 x 10 3 cm 3 ) x (10 6 g/cm 3 ) = 4.2 x 10 9 g = 4.2 x 10 6 kg = 4,200 metric tons 6. Δ m = 20 m = 2.5 log ( l 1 / l 2 ) l 1 / l 2 = 10 8 7. d = 425 LY ( / 3.26 LY/pc) = 120 pc m  M = 5 log ( d / 10 ) m = 5 log ( 120 / 10 ) + (17) = 11.6 mag 8. Because the spectrum showed Si lines, it is a Type Ia supernova. Therefore, the peak absolute magnitude is M = 19 mag. m  M = 5 log ( d / 10 ) 16.5  (19) = 35.5 = 5 log ( d / 10 ) 7.1 = log( d / 10 ) d = 1.3 x 10 8 pc = 130 Mpc Problems 1, 3a, 4, 5, 6, and 7 are worth 1 point each....
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 Spring '11
 sowell
 Physics, Supernova, White dwarf, Type Ia Supernova, peak absolute magnitude

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