Which of the following best explains what scientists think happened to outgassed water vapor on Venus?
A) Ultraviolet light split the water molecules, and the hydrogen then escaped to space.
B) Water was removed from the atmosphere by chemical reactions with surface rock.
C) It is frozen as water ice in craters near the poles.
D) It turned into carbon dioxide by reacting with nitrogen in Venus's atmosphere.
A) Ultraviolet light split the water molecules, and the hydrogen then escaped to space.
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A coil of 160 turns and area 0.20 m2 is placed with its axis parallel to a magnetic field of 0.40 T. The magnetic field changes from 0.40 T in the x-direction to 0.40 T in the negative x-direction in 2.0 s
If the resistance of the coil is 16 ?, at what rate is power generated in the coil? A) 5.0 W B) 10 W C) 15 W D) 20 W E) 25 W
A 650-N tightrope walker stands at the center of the rope such that each half of the rope makes an angle of 10.0° with the horizontal. What is the tension in the rope?
a. 1 870 N b. 660 N c. 3 740 N d. 226 N e. 1 840 N
Astronomers measured the location of the Sun in the Milky Way Galaxy by
A. counting the number of stars. B. plotting the position of O and B stars. C. plotting the position of globular star clusters. D. plotting distribution of water molecules.
What important molecules of life did Miller and Urey brew up?
A) RNA B) fatty acids C) lean acids D) amino acids E) antacids