Please answer this: Question: "What affects the response of the materials in the antenna and transmission medium?" Context: "A necessary condition for the aforementioned reciprocity property is that the materials in the antenna and transmission medium are linear and reciprocal. Reciprocal (or bilateral) means that the material has the same response to an electric current or magnetic field in one direction, as it has to the field or current in the opposite direction. Most materials used in antennas meet these conditions, but some microwave antennas use high-tech components such as isolators and circulators, made of nonreciprocal materials such as ferrite. These can be used to give the antenna a different behavior on receiving than it has on transmitting, which can be useful in applications like radar." Answer:
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Answer: electric current or magnetic field

Please answer this: Question: "Where are beers only sold and not brewed?" Context: "A brewery tap is the nearest outlet for a brewery's beers. This is usually a room or bar in the brewery itself, though the name may be applied to the nearest pub. The term is not applied to a brewpub which brews and sells its beer on the same premises." Answer:
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Answer: brewery tap

Please answer this: Question: "What do you need to book if you want to fly to another location?" Context: "Theoretical analyses show that detours that increase flight distance by up to 20% will often be adaptive on aerodynamic grounds - a bird that loads itself with food to cross a long barrier flies less efficiently. However some species show circuitous migratory routes that reflect historical range expansions and are far from optimal in ecological terms. An example is the migration of continental populations of Swainson's thrush Catharus ustulatus, which fly far east across North America before turning south via Florida to reach northern South America; this route is believed to be the consequence of a range expansion that occurred about 10,000 years ago. Detours may also be caused by differential wind conditions, predation risk, or other factors." Answer:
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Answer:
flight