Astone is dropped at t = 0. a second stone, with 6 times the mass of the first, is dropped from the same point at t = 190 ms. (a) how far below the release point is the center of mass of the two stones at t = 370 ms? (neither stone has yet reached the ground.) (b) how fast is the center of mass of the two-stone system moving at that time?

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?