Astone is dropped from a tower 100 meters above the ground. the stone falls past ground level and into a well. it hits the water at the bottom of the well 5.00 seconds after being dropped from the tower. calculate the depth of the well. given: g = -9.81 meters/second2. a. 22.5 meters b. 50.7 meters c. 100 meters d. 110 meters e. 152.45 meters

I) a gas contained within a piston-cylinder assembly undergoes two processes, a and b, between the same end states, 1 and 2, where p1 = 10 bar, v1 = 0.1 m3 , u1 = 400 kj and p2 = 1 bar, v2 = 1.0 m3 , u2 = 200 kj: ' process a: process from 1 to 2 during which the pressure-volume relation is pv = constant. ' process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to state 2. kinetic and potential energy effects can be ignored. for each of the processes a and b, a) sketch the process on a p-v diagram. b) evaluate the work, in kj. c) evaluate the heat transfer, in kj.(ans : qb,12 = -65.0 kj)