14. Calculate the contact angle of wetting the surface of a solid body with a liquid, the values of surface tensions of which and their dispersion components are given in Table 2.8

Solid substance – Paraffin wax
bs mJ/m2 24.8
bsd mJ/m2 24.8
Liquid substance (3 and 10 options)
Option 3
peanut butter
b mJ/m2 40.0
bd mJ/m2 20.8
Option 10
polyethylene glycol PEG-400
b mJ/m2 45.2
bd mJ/m2 30.1

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