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A 1.2-mm-diameter tube is inserted into an unknown liquid

Chapter 2, Problem 95P

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QUESTION:

Problem 95P

A 1.2-mm-diameter tube is inserted into an unknown liquid whose density is 960 kg/m3, and it is observed that the liquid rises 5 mm in the tube, making a contact angle of 15°. Determine the surface tension of the liquid.

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QUESTION:

Problem 95P

A 1.2-mm-diameter tube is inserted into an unknown liquid whose density is 960 kg/m3, and it is observed that the liquid rises 5 mm in the tube, making a contact angle of 15°. Determine the surface tension of the liquid.

ANSWER:

ANSWER:

Step 1:-

Diameter of the tube is, .

So, the radius will be, .

The density of the liquid where the tube is inserted is, .

Rise of liquid in the tube is, .

Angle of contract is, .

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