Question: Interference can hamper memorization and retrieval. There is retroactive interference, when learning new information makes it harder to recall old information and proactive interference, where prior learning disrupts recall of new information. Although interference can lead to forgetting, it is important to keep in mind that there are situations when old information can facilitate learning of new information. Knowing Latin, for instance, can help an individual learn a related language such as French this phenomenon is known as positive transfer.
Is there an answer to this question: What is proactive interference?

Answer: where prior learning disrupts recall of new information

Question: Some copyright owners voluntarily reduce the scope of what is considered infringement by employing relatively permissive, "open" licensing strategies: rather than privately negotiating license terms with individual users who must first seek out the copyright owner and ask for permission, the copyright owner publishes and distributes the work with a prepared license that anyone can use, as long as they adhere to certain conditions. This has the effect of reducing infringement and the burden on courts by simply permitting certain types of uses under terms that the copyright owner considers reasonable. Examples include free software licenses, like the GNU General Public License (GPL), and the Creative Commons licenses, which are predominantly applied to visual and literary works.
Is there an answer to this question: Besides lessening the burden on the courts, what is the effect of this license?

Answer: reducing infringement

Question: This law is a fundamental principle of physics. As shown rigorously by Noether's theorem, the conservation of energy is a mathematical consequence of translational symmetry of time, a property of most phenomena below the cosmic scale that makes them independent of their locations on the time coordinate. Put differently, yesterday, today, and tomorrow are physically indistinguishable. This is because energy is the quantity which is canonical conjugate to time. This mathematical entanglement of energy and time also results in the uncertainty principle - it is impossible to define the exact amount of energy during any definite time interval. The uncertainty principle should not be confused with energy conservation - rather it provides mathematical limits to which energy can in principle be defined and measured.
Is there an answer to this question: What shows that the conservation of energy is a mathematical consequence of translational symmetry of time?

Answer: Noether's theorem

Question: Following the war, some of these military airfields added civil facilities for handling passenger traffic. One of the earliest such fields was Paris Le Bourget Airport at Le Bourget, near Paris. The first airport to operate scheduled international commercial services was Hounslow Heath Aerodrome in August 1919, but it was closed and supplanted by Croydon Airport in March 1920. In 1922, the first permanent airport and commercial terminal solely for commercial aviation was opened at Flughafen Devau near what was then Konigsberg, East Prussia. The airports of this era used a paved "apron", which permitted night flying as well as landing heavier aircraft.
Is there an answer to this question: What was the first airport to operate scheduled international commercial services?

Answer:
Hounslow Heath Aerodrome