Problem: Vacuum:

Thermal conductivity gauges rely on the fact that the ability of a gas to conduct heat decreases with pressure. In this type of gauge, a wire filament is heated by running current through it. A thermocouple or Resistance Temperature Detector (RTD) can then be used to measure the temperature of the filament. This temperature is dependent on the rate at which the filament loses heat to the surrounding gas, and therefore on the thermal conductivity. A common variant is the Pirani gauge which uses a single platinum filament as both the heated element and RTD. These gauges are accurate from 10 torr to 103 torr, but they are sensitive to the chemical composition of the gases being measured.

How do thermal conductivity gauges use a single platinum filament as?
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A: unanswerable

Problem: As an electro-magnetic wave travels through the different parts of the antenna system (radio, feed line, antenna, free space) it may encounter differences in impedance (E/H, V/I, etc.). At each interface, depending on the impedance match, some fraction of the wave's energy will reflect back to the source, forming a standing wave in the feed line. The ratio of maximum power to minimum power in the wave can be measured and is called the standing wave ratio (SWR). A SWR of 1:1 is ideal. A SWR of 1.5:1 is considered to be marginally acceptable in low power applications where power loss is more critical, although an SWR as high as 6:1 may still be usable with the right equipment. Minimizing impedance differences at each interface (impedance matching) will reduce SWR and maximize power transfer through each part of the antenna system.
Impedance matching makes an important difference in what antenna function?
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Answer: power transfer

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Retail versions of Windows 8 are only able to install these apps through Windows Storea namesake distribution platform which offers both apps, and listings for desktop programs certified for comparability with Windows 8. A method to sideload apps from outside Windows Store is available to devices running Windows 8 Enterprise and joined to a domain; Windows 8 Pro and Windows RT devices that are not part of a domain can also sideload apps, but only after special product keys are obtained through volume licensing.
Where can't Windows 8 install apps from?
A: unanswerable

Context and question: Transduction of bacterial genes by bacteriophage appears to be a consequence of infrequent errors during intracellular assembly of virus particles, rather than a bacterial adaptation. Conjugation, in the much-studied E. coli system is determined by plasmid genes, and is an adaptation for transferring copies of the plasmid from one bacterial host to another. It is seldom that a conjugative plasmid integrates into the host bacterial chromosome, and subsequently transfers part of the host bacterial DNA to another bacterium. Plasmid-mediated transfer of host bacterial DNA also appears to be an accidental process rather than a bacterial adaptation.
How does conjugation take place?
Answer: conjugative plasmid integrates into the host bacterial chromosome

Question: The bandolim (Portuguese for "mandolin") was a favourite instrument within the Portuguese bourgeoisie of the 19th century, but its rapid spread took it to other places, joining other instruments. Today you can see mandolins as part of the traditional and folk culture of Portuguese singing groups and the majority of the mandolin scene in Portugal is in Madeira Island. Madeira has over 17 active mandolin Orchestras and Tunas. The mandolin virtuoso Fabio Machado is one of Portugal's most accomplished mandolin players. The Portuguese influence brought the mandolin to Brazil.
Is there an answer to this question: Where can you see mandolins a part of in Portgal?

Answer: traditional and folk culture

QUES: On 26 February 2012, The Sun on Sunday was launched to replace the closed News of the World, employing some of its former journalists. In late 2013, it was given a new look, with a new typeface. The average circulation for The Sun on Sunday in March 2014 was 1,686,840; but in May 2015 The Mail on Sunday sold more copies for the first time, an average of 28,650 over those of its rival: 1,497,855 to 1,469,195. Roy Greenslade issued some caveats over the May 2015 figures, but believes the weekday Daily Mail will overtake The Sun in circulation during 2016.

In what year was The Sun's look changed?
What is the answer?
ANS:
2013