the Depth of a sea is 6500 m and the speed of sound in water is . Calculate the time required for echo, when a sound wave is sent to bottom.) 1500 m/s ​

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?