Author Question: How is most of the energy required for secondary wastewater treatment consumed? A) as electricity ... (Read 31 times)

mrsjacobs44 · **on:** Jul 29, 2018

How is most of the energy required for secondary wastewater treatment consumed?

A) as electricity to power air pumps for aeration
B) as electricity to illuminate UV lamps
C) as heat to run distillation equipment
D) as electricity to power hydraulic pumps for reverse osmosis
E) none of the above

Question 2

If the relative mass of a pingpong ball is 1/20 that of a golf ball, how many pingpong balls would you need to equal the mass of two golf balls?

A) 40
B) 20
C) 24
D) 100
E) 6.022 1023