The name of the average distance from Earth to the Sun is one ____________________
Fill in the blank(s) with correct word
astronomical unit
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Estimate the thermal conductivity of platinum at -10ºC if its electrical conductivity is 6 x 10^7 mhos/m, based on the Wiedemann-Franz law. Note: 1 mho = 1 amp/volt = 1 coulomb/volt-s, 1 W = 1 J/s = 1 volt-coulomb/s.
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How can the stars in a close binary system dramatically affect each other?
A) The close orbits can allow tidal forces to rip one or both stars apart. B) Transfer of mass from one star to another can change how both stars evolve. C) Intense radiation from one star can heat the surface of the other star, causing it to undergo a supernova explosion.
The ________ track is the path the star takes on the H-R diagram as it ages
Fill in the blank(s) with correct word
a type of star cluster that contains mostly very old stars is
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