A scientist observes that the electrical resistance of a superconducting material drops to zero when the material is cooled
to very low temperatures. Which of the following statements best describes what the scientist is observing?
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O The scientist is observing the electrical power of a superconductor.
• The scientist is observing the temperature of a superconductor.
O The scientist is observing an intensive property of a superconductor.
iS O The scientist is observing an extensive property of a superconductor.
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