Explain why water with detergent dissolved in it should have small angles of contact.
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Answered by
7
Water with detergent has little points of contact (Let θ) . This is on the grounds that for a smallθ, there is a quick narrow ascent of the cleanser in the material. The narrow ascent of a fluid is specifically corresponding to the cosine of the edge of contact . If θ is little , at that point cos θ will be huge and the ascent of the cleanser water in the fabric will be quick .
From antiquated occasions, compound added substances were utilized to encourage the mechanical washing of attire with water. The Italians utilized a blend of sulfur and water with charcoal to clean material. Egyptians added fiery remains and silicates to relax water. Cleansers were the first detergents.
From antiquated occasions, compound added substances were utilized to encourage the mechanical washing of attire with water. The Italians utilized a blend of sulfur and water with charcoal to clean material. Egyptians added fiery remains and silicates to relax water. Cleansers were the first detergents.
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Hii buddy,
◆ Explained Answer -
- As detergents are the wetting agents, they decrease the angle of contact below 90°.
- There is fast capillary rise of detergent in cloth which is directly proportional to cosine of the angle.
- As capillary rise is higher, cosine of angle is bigger which implies angle of contact must be smaller.
Hope that solved your doubt...
◆ Explained Answer -
- As detergents are the wetting agents, they decrease the angle of contact below 90°.
- There is fast capillary rise of detergent in cloth which is directly proportional to cosine of the angle.
- As capillary rise is higher, cosine of angle is bigger which implies angle of contact must be smaller.
Hope that solved your doubt...
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