Ernesto is an engineer who is trying to develop a lighter, stronger carbon wire. He looks to nanotechnology, because he wants a wire with high resistance so it can give off heat. Where is Ernesto’s error? Carbon wires are heavy. Carbon wires have low resistance. Carbon wires are weak. Carbon wires are not a form of nanotechnology.

B. Carbon wires have low resistance.

Explanation:

Nanotechnology is a technology that deals with the study and applications of matter on a very minute scale, . This technology has a lot of applications in various fields of study and has been used in the fabrication of carbon nanotubes.

Carbon nanotubes are ultra thin carbon wires which can be used majorly in electronics. This wire has remarkable properties (it behaves as a metal or semiconductor)  that make it suitable for electronic applications.

Ernesto made an error by planning to use carbon wire to generate heat. Carbon nanotubes has a low resistance, thus low thermal dissipation.

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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less than one you can't create energy