According to author Norman Mailer from his book Of a Fire on the Moon, quoted in the opening section,
A) powerful new science-based technologies are bringing about a better life on this planet.
B) the creation of Earth was a beautiful and spiritually significant event for the human race.
C) intelligent extraterrestrial life forms probably exist in many places, and may visit Earth in the near future.
D) the establishment of a technology base on the moon is a crucial step in the exploration of the solar system.
E) science is moving us rapidly along new paths, but we haven't stopped to consider where those paths might lead.
E
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The diagram below represents energy levels in a hydrogen atom. Each level is labeled with its energy (above the ground state of Level 1) in units of electron/volts (eV). The labeled transitions represent an electron moving between energy levels. Which transition, as shown, is not possible?
A) A B) B C) C D) D E) E
The jovian planets are thought to have formed as gravity drew hydrogen and helium gas around planetesimals made of __________.
a. only rocks and metals b. only ices c. rocks, metals, and ices d. rocks, metals, ices, and hydrogen and helium gases
Two tanks of gas, one of hydrogen, H2, and one of helium, He, contain equal numbers of moles of gas. The gram-molecular mass of He is twice that of H2. Both tanks of gas are at the same temperature, 293 K. Which statement(s) below is(are) correct when we ignore vibrational motion?
A. The total internal energy of the hydrogen is the same as that of the helium. B. The total internal energy of the hydrogen is 1.4 times that of the helium. C. The total internal energy of the helium is 1.4 times that of the hydrogen. D. The total internal energy of the hydrogen is 1.67 times that of the helium. E. The total internal energy of the helium is 1.67 times that of the hydrogen.
A light beam is shining on a metal target that has a work function of 1.8 eV. If a stopping potential of 0.7 V is required, what is the wavelength of the incoming monochromatic light? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 497 nm b. 166 nm c. 796 nm d. 1130 nm e. 691 nm