The radius of the earth is 3963 mi. Which one of the following numbers is closest to the surface area of the earth? (1.0 mi = 1609 m)
A) 4.9 × 107 m2
B) 1.3 × 1014 m2
C) 2.6 × 1014 m2
D) 5.1 × 1014 m2
D
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How does the unified model of AGN explain blazars?
a. Blazars are Seyferts galaxies seen edge on. b. Blazars are regions of the intergalactic medium where gas has been heated by a nearby AGN. c. Blazars are relativistic jets from an AGN pointed toward our light of sight. d. Blazars are newly formed AGN from a recently galactic collision.
Latent Heats: If you add 700 kJ of heat to 700 g of water originally at 70.0°C, how much water is left in the container? The latent heat of vaporization of water is 22.6 × 105 J/kg, and its specific heat capacity is 4186 J/kg ? K.
A. 429 g B. 258 g C. 340 g D. 600 g E. none
Which compound has three hydroxyl groups?
a. Ethylene glycol b. Ethanol c. Cholesterol d. Glycerol
Glacial deposits are characteristically
A) well sorted and well rounded. B) composed of unsorted, angular rock fragments. C) asymmetrical rock debris. D) called outwash.