(a)

The velocity of a molecule of a liquid flowing through a pipe is .

Where is the radius of the pipe in inches.

is distance of the molecules from the center of the pipe in inches.

is constant.

The value of a particular liquid is .

The value of the particular pipe is .

Substiute the values in .

Graph :

Graph the function :

(b)

Molecules are closer to the wall of the pipe then .

.

The limiting velocity of the molecules closer and closer to the wall of the pipe is .

Graph of :

(b) The limiting velocity of the molecules closer and closer to the wall of the pipe is .