During a compaction test in the geotechnical laboratory, the students compacted a clayey soil into a cylindrical mold 4 in. in diameter and 4.58 in. in height. The compacted soil in the mold weighed 4 lb, and it had a moisture content of 12%. If Gs 5 2.72, determine the following: a. Dry unit weight. b. Void ratio. c. Degree of saturation. d. Additional water (in lb) needed to achieve 100% saturation in the soil sample.

Two technicians are discussing the intake air temperature (iat) sensor. technician a says that the computer uses the iat sensor as a backup to the engine coolant temperature (ect) sensor. technician b says that the powertrain control module (pcm) will subtract the calculated amount of fuel if the air measures hot. who is correct

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature