Problem: In the Yoma tractate of the Babylonian Talmud the name Gomer is rendered as Germania, which elsewhere in rabbinical literature was identified with Germanikia in northwestern Syria, but later became associated with Germania. Ashkenaz is linked to Scandza/Scanzia, viewed as the cradle of Germanic tribes, as early as a 6th-century gloss to the Historia Ecclesiastica of Eusebius. In the 10th-century History of Armenia of Yovhannes Drasxanakertc'i (1.15) Ashkenaz was associated with Armenia, as it was occasionally in Jewish usage, where its denotation extended at times to Adiabene, Khazaria, Crimea and areas to the east. His contemporary Saadia Gaon identified Ashkenaz with the Saquliba or Slavic territories, and such usage covered also the lands of tribes neighboring the Slavs, and Eastern and Central Europe. In modern times, Samuel Krauss identified the Biblical "Ashkenaz" with Khazaria.
Saadia Gaon identified Ashkenaz with the Saquliba or what territories?
The answer is the following: Slavic

Problem: By the late 1990s, blue LEDs became widely available. They have an active region consisting of one or more InGaN quantum wells sandwiched between thicker layers of GaN, called cladding layers. By varying the relative In/Ga fraction in the InGaN quantum wells, the light emission can in theory be varied from violet to amber. Aluminium gallium nitride (AlGaN) of varying Al/Ga fraction can be used to manufacture the cladding and quantum well layers for ultraviolet LEDs, but these devices have not yet reached the level of efficiency and technological maturity of InGaN/GaN blue/green devices. If un-alloyed GaN is used in this case to form the active quantum well layers, the device will emit near-ultraviolet light with a peak wavelength centred around 365 nm. Green LEDs manufactured from the InGaN/GaN system are far more efficient and brighter than green LEDs produced with non-nitride material systems, but practical devices still exhibit efficiency too low for high-brightness applications.[citation needed]
What LEDs are more efficient when produced from the InGaN/GaN systems than without?
The answer is the following: Green

Problem: In response to a given problem situation (), a number of competing conjectures, or tentative theories (), are systematically subjected to the most rigorous attempts at falsification possible. This process, error elimination (), performs a similar function for science that natural selection performs for biological evolution. Theories that better survive the process of refutation are not more true, but rather, more "fit"—in other words, more applicable to the problem situation at hand (). Consequently, just as a species' biological fitness does not ensure continued survival, neither does rigorous testing protect a scientific theory from refutation in the future. Yet, as it appears that the engine of biological evolution has, over many generations, produced adaptive traits equipped to deal with more and more complex problems of survival, likewise, the evolution of theories through the scientific method may, in Popper's view, reflect a certain type of progress: toward more and more interesting problems (). For Popper, it is in the interplay between the tentative theories (conjectures) and error elimination (refutation) that scientific knowledge advances toward greater and greater problems; in a process very much akin to the interplay between genetic variation and natural selection.
What process in science is like the process of natural selection in nature?
The answer is the following: error elimination

Problem: Details of the overall United States intelligence budget are classified. Under the Central Intelligence Agency Act of 1949, the Director of Central Intelligence is the only federal government employee who can spend "un-vouchered" government money. The government has disclosed a total figure for all non-military intelligence spending since 2007; the fiscal 2013 figure is $52.6 billion. According to the 2013 mass surveillance disclosures, the CIA's fiscal 2013 budget is $14.7 billion, 28% of the total and almost 50% more than the budget of the National Security Agency. CIA's HUMINT budget is $2.3 billion, the SIGINT budget is $1.7 billion, and spending for security and logistics of CIA missions is $2.5 billion. "Covert action programs", including a variety of activities such as the CIA's drone fleet and anti-Iranian nuclear program activities, accounts for $2.6 billion.
Who is the only federal employee that can spend un-vouched for money?
The answer is the following:
the Director of Central Intelligence