What is the maximum current Imax in a straight superconducting niobium wire of radius 1.5 mm ? Keep in mind that the superconductivity of a niobium wire is destroyed if the magnetic field at the surface of the wire reaches or exceeds 0.10 T .

Ateacher gives students four liquids commonly found in the kitchen - vinegar, apple juice, dish detergent, and milk - and ph indicator strips, which measure acidity. the teacher asks the students to put the liquids in order from most acidic to most basic. what type of investigation could the students conduct to determine the correct order for the liquids?