Question

Dynamical friction becomes inefficient at values on the order of this unit, well before the inspiral stage, in this unit’s “final problem.” When d is expressed in this unit, log-base-ten of d equals one plus one-fifth times a “modulus” equal to little m minus big M. (20[1])This unit is typically used to report the reciprocal of a small angle denoted p or pi. Kilometers per second per (*) million of this unit is the typical (10[1])compound (10[2])unit (10[1])for Hubble’s constant. (10[3])This unit, (10[1])which is roughly equal (10[1])to three light-years, (10[6])is (10[1])defined (10[3])as (10[1])the distance at which an object has a (10[1])parallax of one (10[1])arcsecond. (10[1])For 10 points, name this astronomical unit of distance that is often (10[2])misidentified as a unit of time. (10[2])■END■ (10[6])

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