25 mg chemical y (log kow = 2.88) is added to a microcosm
(i. e., tank) that contains 1 kg soil, 20 l water. chemical y has
negligible volatility (very low partitioning to air). the soil is
mized with water for several days until equilibrium (between the
chemical concentration on the soil and in the water) is
reached.
if the soil contains 2% organic carbon and it can be assumed
that koc=0.5*kow
what is the concentration of the chemical in the water (mg/l),
and in the soil (mg/kg)?

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.