Someone please makeup a hypothesis for me rq make it make sense!

Rohit is trying to tune an instrument

What object a collides with object b and bounces back its final momentum is?

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?