3.6.5　Data recording and processing

3.6.5　Data recording and processing

Record observations in Table 3.6.1-Table 3.6.3,respetively.

CalculatingΔU(ΔU=U1-U2)and the corresponding surface tension coefficient based on Equation(3.6.7).Fill the experimental results in Table 3.6.2 and Table 3.6.3,and make calculations according to the requirements in the table.

Table 3.6.1　Calibration of force sensor

Table 3.6.2　Surface tension coefficient of water

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Table 3.6.3　Surface tension coefficient of Anhydrous ethanol

Theoretical values of surface tension coefficient of water in contact with air at different temperatures are shown in table 3.6.4.

Measurements:

Table 3.6.4　Surface tension coefficient table of water in contact with air