H II Regions are also called emission nebulae
a. True
b. False
Indicate whether the statement is true or false
True
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The separation of charges within a polar molecule is called a(n)
A) dipole. B) dipole-dipole. C) ionic bond. D) strong attraction. E) polar bond.
Might reverse osmosis be used to obtain fresh water from a sugar-water solution?
A) No, osmosis and reverse osmosis only apply to aqueous solutions containing ions. B) Yes, reverse osmosis can be applied to any aqueous solution for the generation of fresh water. C) No, the molecular attractions between sugar and water are too strong. D) Yes, because sugar molecules are smaller than sodium or chloride ions.
Mica is not found in
A) slate. B) schist. C) gneiss. D) quartzite.
A steel sphere sits on top of an aluminum ring. The steel sphere (? = 1.10 × 10^?5/C°) has a diameter of 8 000 cm at 0°C. The aluminum ring (? = 2.40 × 10^?5/C°) has an inside diameter of 7 991 cm at 0°C. Closest to which temperature given will the sphere just fall through the ring?
a. 47°C b. 102°C c. 87°C d. 108°C e. 65°C