A boy weighing 86-lb starts from rest at the bottom A of a 12-percent incline and increases his speed at a constant rate to 4 mi/hr as he passes B, 35 ft along the incline from A. Determine his power output as he approaches B.

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?