Recycling is a term generally reserved for ____. ?
A. ?reuse of waste materials generated during manufacturing
B. ?reprocessing of waste materials generated during manufacturing
C. ?postconsumer waste materials
D. ?incineration of waste materials
Answer: C
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Photosynthesis reaches to the bottom of the limnetic zone
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A device called a ____ is used to control the large volume of air in a air conditioning system.
A. pilot lockout B. pilot positioner C. pilot fixator D. pilot engagement
The Darcy–Weisbach equation states that the power-generating capacity in a hydroelectric system that is lost due to head loss is given by P=??QH, where ? is the efficiency of the turbine, ? is the specific gravity of water,Q is the flow rate, and H is the head loss. Assume that ?=0.85 ± 0.02, H=3.71± 0.10m, Q=60± 1m3/s, and ?=9800N/
with negligible uncertainty.
a. Estimate the power loss (the units will be in watts), and find the uncertainty in the estimate. b. Find the relative uncertainty in the estimated power loss. c. Which would provide the greatest reduction in the uncertainty in P: reducing the uncertainty in ? to 0.01, reducing the uncertainty in H to 0.05, or reducing the uncertainty in Q to 0.5?
Explosion welding is a solid state process
Indicate whether the statement is true or false