Вопрос № 237474 - Английский язык

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 _____is a measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects.

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Sonar (Sound Navigation and Ranging) is employed to locate submerged enemy 1________________. Like radar it is an echo-ranging 2__________________. It operates in the following way - a ship 3________________ a sound wave into the water. Encounting an obstacle the wave is reflected back to the ship, which – since the speed of sound through water is known - determines its distance from the object from the time it took the echo to return. To create the original sound wave, the ship generates 4________________ signals in а transmitter; it then sends these to a transducer, positioned on its keel as deeply in the water as possible. The transducer converts the signals into sound and transmits them through the water.

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 _____ is a pressure measuring instrument, usually limited to measuring pressures lower than atmospheric.

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 _____ is a small electronic device containing a semiconductor and having at least three electrical contacts, used in a circuit as an amplifier, detector, or switch.

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 _____ is a semiconductor device made of materials whose resistance varies rapidly and predictably with temperature.

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 _____ is a device for storing electric charge, used in electronic circuits.