a 1500 kg pick-up truck is acted upon by an external force which reduces its velocity from 8.6 m/s to 4.3 m/s in 6.7 s. what is the value of the returning force?

Ineed the answer to question 1 , i’m desperate

What is the freezing point of radiator fluid that is 50% antifreeze by mass? kf for water is 1.86 ∘c/m.

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?