Question

What is the capillary rise of ethanol in a glass tube with a 0.1 mm radius if the surface tension of ethanol is 0.032Jm2 and the density of ethanol is 0.71gcm3? Assume that the contact angle of ethanol in a glass tube is 0 degrees.

Answer 1

0.092

Step-by-step explanation:

height=2Tcosθrpg2(0.032Jm2)(710kgm3)(9.8ms2)(1×10−4 m)=0.092 m

Notice that constants in the mathematical formula are exact, so they do not constrain the number of significant figures.