A scientist observes that the electrical resistance of a superconducting material drops to zero when the material is cooled to very low temperatures what did the scientist is observe?

The scientist is observing an intensive property of a superconductor.

Explanation:

An intensive property of an object can be described as a physical property of matter that does not change with size or amount of matter of the object. In other words, an intensive property is independent of the mass or size of an object.

For example, electrical resistance or conductivity of an object does not depend on the size or mass of an object. if an object is a conductor, it will conduct electricity independent of the size of the object.

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.