Question

4
12. A river flowing at 20.0 m3/sec has a tribu-
tary feeding into it with a flow rate of 5.0
m3/sec. Upstream from the point of junc-
tion. The fluoride concentration is 5 mg/L
in the river and 10 mg/L in the tributary.
Assuming fluoride to be conservative
sub-
stance and rapid mixing in the river, the
downstream concentration in the river is​

Answer 1

Answer:

Glass production involves two main methods – the float glass process that produces sheet glass, and glassblowing that produces bottles and other containers. It has been done in a variety of ways during the history of glass.