What is the most likely origin of the Valles Marineris on Mars?
A) it is a fissure in the surface carved out by a giant impact
B) it is a tectonic fracture associated with the formation of the adjacent Tharsis bulge
C) it is a huge canyon system formed by water erosion
D) it was formed from the separation of two tectonic plates
B
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How many atoms of oxygen are contained in 44 g of carbon dioxide, CO2?
a. 3.01 × 10^23 b. 12.0 × 10^23 c. 6.02 × 10^23 d. None of these
A solar cell has a light-gathering area of 10 cm2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1 000 W/m2 sunlight. What is the efficiency of the solar cell?
a. 16% b. 7% c. 23% d. 4% e. 32%
What causes a mirage?
a. A layer of cold air close to the ground. b. The physiological effects of water deprivation. c. A layer of warm air close to the ground. d. A "sandwich" of layers of warm, cold, and warm air. e. Extremely hot air all the way from the ground to the top of the atmosphere.
Atomic Nucleus: Write the standard nuclear notation for the following nuclei: hydrogen-2, sulfur-33, and lead-207.
What will be an ideal response?