What experimental term is it when a ruler is drop to the floor

When a neutrally charged atom loses an electron to another atom, the result is the creation of a. two charged atoms. b. two negatively charged atoms. c. two positively charged atoms. d. two neutrally charged atoms.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?