Liquid nitrogen is super cold and lowers the temperature of the ceramic tape to the point where it conveys electricity with zero resistance.The United States loses an enormous amount of electricity each year to resistance.Because cooled superconductors have no resistance.they waste much less power.0ther cities are watching the Frisbie experiment in the hope that they might switch to superconducting cable and conserve power too.
36 What is the benefit of the revolution mentioned in the first paragraph?
A With a flip of swish.electricity can be transmitted.
B Other American cities can benefit from the high performance cables.
C Great amounts of power can be conserved.
D Detroit will first receive electricity transmitted by the new electrical cables
37 Compared to common electrical conductors,superconductors
A have little or no electrical resistance.
B Can be used for a long time.
C are not energy-efficient.
D can be made easily.
38 At what temperature does the superconducting ceramic lose its resistance?
A -143 degree Celsius.
B -263 degree Celsius.
C As long as it is ice-cold.
D Absolute zero.
39 What element enables the ceramic tape to lower its temperature?
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