Which is a characteristic of a step–down transformer? A.
There are fewer loops in the secondary coil than in the primary coil.
B.
It converts direct current into alternating current.
C.
The voltage of the secondary coil is greater than that of the primary coil.
D.
There are fewer loops in the primary coil than in the secondary coil.

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?