The ____________________ of the Sun is not visible during a total solar eclipse
Fill in the blank(s) with correct word
photosphere
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A very loud train whistle has an acoustic power output of 100 W. If the sound energy spreads out spherically, what is the intensity level in dB at a distance of 89.0 meters from the train? (I0 = 10?12 W/m2)
a. 20.7 dB b. 70.0 dB c. 90.0 dB d. 95.0 dB e. 207 dB
The smelting of a metal
(a) Raises the temperature above the melting point. (b) Separates the metal from the ore. (c) Deforms the metal into a shape. (d) Cools the metal very rapidly from a high temperature.
The age of the whole Galaxy has been found from studies of its oldest stars in the ________ clusters that orbit in the Halo
Fill in the blank(s) with correct word
The metamorphic property of flat or elongated mineral grains in parallel layers is called
A) schist. B) cleavage. C) foliation. D) lithification.