A pesticide truck spills 91 kg of a solution containing 80% (by mass) DDT in water on a dirt road over an area of 85 m2. The average depth for the DDT is 4 cm. The bulk density of the soil is 1800 kg/m3. How long will it take for the DDT to volatilize sufficiently to reduce the level in the soil to 0.01 ppm (mg/kg)

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form

A15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°c to 175°c. what is the specific heat capacity of iron?

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)