The diagram shows a plot of the temperature of the sun as a function of distance above the bottom of the photosphere. At what distance above the bottom of the photosphere does the temperature of the sun change the most rapidly with distance?
a. 1,000 km
b. 2,300 km
c. 2,500 km to 4,000 km
d. 400 km
e. a and c
B
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A. 24 ? B. 4.0 ? C. 1.8 ? D. 2.7 ?
What is the activation energy?
A) the minimum amount of energy to break the bonds in reactants B) the amount of energy required to activate a phase change C) the energy difference between the reactants and the products D) the amount of energy required to separate reactants from the products E) the hill
How are the Tully-Fisher calculations for the distance to a galaxy different from those used for spectroscopic parallax?
Good tracers of the spiral arms of our galaxy are all I. very old. II. very young. III. very luminous. IV. moving with large radial velocities
a. I & III b. I & IV c. II & III d. II & IV e. I, III, & IV