The solutions that are used in this experiment have alcohols as both the solvent and the reactant. the excess
alcohol is removed by (circle the letter):
a. simple distillation.
b. vacuum filtration.
c. liquid-liquid extraction.

Blank liquids and gases exert a buoyant force on objects placed in them

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Which body is in equilibrium? (1) a satellite orbiting earth in a circular orbit (2) a ball falling freely toward the surface of earth (3) a car moving with a constant speed along a straight, level road (4) a projectile at the highest point in its trajectory