Two point charges of 9μC and 4μC are placed a distance of 4 m apart. a. Calculate the magnitude of the force, in Newtons, on a positive 5μC charge at the midpoint between the two charges.

b. Find the point, measured in meters from the 9μC charge, between the two charges where the force on the 5μC charge is 0?

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?