Where do most dust grains form?
A) in molecular clouds
B) in the winds of red giant stars
C) in planetary nebulae
D) in supernovae
E) all of the above
B
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What happens when the molecule-to-molecule attractions in the solute are comparable to those in the solvent?
A) The solute can have infinite solubility in the solvent. B) The solute does not dissolve in the solvent. C) The material has only limited solubility in the solvent. D) The solution will become saturated. E) none of the above
The nadir marks the point of the celestial sphere directly above your head
a. True b. False Indicate whether the statement is true or false
Impedance: What inductance must be put in series with a 200-? resistor at 4.00 kHz to have a total impedance of 240 ??
A. 3.28 mH B. 4.28 mH C. 5.28 mH D. 6.28 mH E. 12 mH
What is a unique geologic feature of Miranda?
a. faults b. ovoids c. lava flows d. sinuous rilles e. sulfur-based volcanoes