By measuring the equilibrium between liquid and vapour phases of an acetone (a)–methanol (m) solution at 57.2°c at 1.00 atm, it was found that 400 0.x a = when 516 0.y a = . calculate the activities and activity coefficients of both components in this solution on the raoult’s law basis. the vapour pressures of the pure components at this temperature are: kpa p* a 105 = and kpa. p * m 5 73= . ( a x is the mole fraction in the liquid and a y the mole fraction in the vapour.)

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.