Translate the sentences into Russian and find Complex Object or Complex Subject 1. The electrical resistivity of a mercury wire was found to disappear when cooled to -269°C.

2. The phenomenon of superconductivity appears to have been discovered as early as 1911.

3. Scientists in many countries consider propeller engines to be much more economical.

4. A Dutch scientist discovered a superconductor to return to a normal state when a magnetic field was applied.

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