You're looking at a fault trace in the field. You observe a polished surface with linear grooves on it, and fine powder next to it. In more technical terms, what are you seeing? Choose one: A. slip lineation, slickensides, and fault breccia B. shear zone, fault gouge, and fault breccia C. slickensides, slip lineations, and fault gouge D. slickensides, fault breccia, and fault gouge

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.