Imagine That You Work for a Chemical Engineering Firm, and You

Multiple Choice

Imagine that you work for a chemical engineering firm, and you have just taken delivery of a very narrow glass pipe. You need to find out whether the inside radius of this pipe matches specifications. To determine this, you put one end of the pipe in a beaker of distilled water, and you observe that capillary action pulls the water 3.0 cm up the pipe. If you assume that the angle of contact is zero, the density of water 1000 km m-3 and the surface tension of water 0.072 N/m, then what is the approximate inside radius of the pipe?

A) 0.05 mm.
B) 0.1 mm.
C) 0.5 mm.
D) 1 mm.
E) 5 mm.