Match the scenario to the type of green initiative it represents. 1. A small city recycles wastewater to use for a sprinkler system in a public park.
conserve water
2. Builders test for radon gas in new home construction.
protect air quality
3. A construction crew removes asbestos shingles from an older home.
reduce toxins

conserve water
protect air quality
reduce toxins

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.