What is the inductance of a series RL circuit in which R = 1.0 K? if the current increases to one-third of its final value in 30 ?s?
a. 74 mH
b. 99 mH
c. 49 mH
d. 62 mH
e. none of the above
a
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____________________ can be used to determine the distance to a star when the spectrum of the star can be used to determine its spectral type and luminosity class
Fill in the blank(s) with correct word
Consider positive and negative charges moving horizontally through the four regions in the figure below. Rank the currents in these four regions, from lowest to highest. (Ia is the current in Figure (a), Ib the current in Figure (b), etc.)
A parsec is I. a unit of length used in astronomy II. 2.06 × 10^5 AU III. the distance to an imaginary star whose stellar parallax is one arc second IV. 3.26 light years V. the longest unit of length in astronomy
a. I, II, V b. II, IV c. I, III, IV, V d. I, II, III, IV, IV
Perhaps the most fundamental role that enzymes play in living cells is
A) attacking foreign bodies like bacteria and viruses B) carrying oxygen across cell membranes C) facilitating the replication of DNA and the reading of the genetic code D) the breaking down of more complex molecules