If we have a tube of diameter 30mm and particles of diameter 3mm, the length of the tube is 10cm and the number of pellets is 100. The flow rate is 5cm3/s, then what is the superficial velocity?

If we have a tube of diameter 30mm and particles of diameter 3mm, the

1.	If we have a tube of diameter 30mm and particles of diameter 3mm, the length of the tube is 10cm and the number of pellets is 100. The flow rate is 5cm3/s, then what is the superficial velocity?
A.	0.5cm/s
B.	0.45cm/s
C.	0.7cm/s
D.	0.8cm/s
Answer» D.