Question

According to the text, complete the sentence: “The microwave oven…”

Accepted Answer

D) and radars used during the World War II both count on the magnetron as one of its components.

Answer

A) relies on the proper function of radars.

Answer

B) and the magnetron were repurposed after their inventions.

Answer

C) is one more example of the technological inventions which have benefited from the innovations generated during the space race.

Answer

E) was first idealized at General Electric. QUESTÕES DE 27 A 29  Soon enough, say some engineers, miniature wireless sensors will be located in spots where it would be inconvenient, to say the least, to change their batteries – inside your body, within the steel and concrete of buildings, in the dangerous innards of chemical plants. But today, even the most robust nodes can be counted on to last only a few years. Ideally, engineers need wireless sensors that can last forever without external power sources or battery changes. According to research presented in December at the International Electron Devices Meeting, in Baltimore, that dream is within reach.

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