A compacted base aggregate sample has λ (%) air void by the total volume of the sample. The specific gravity of the aggregate is SG. The water content of the sample is w (%). It is known the density of water is rhow gram/cm3 . What is the dry density of this sample, rhodry in terms of λ, SG, and rhow? Refer to the derivation for zero air void density?

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.