Supposed there is no electrical current in a coil of wire that contains a permanent magnet. Which statement must be true? A. The coil and the magnet are of different lengths
B. The coil and the magnet are the same length
C. The coil and the magnet are not moving relative to each other
D. The coil and the magnet are moving relative to each other

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?