Question Detail

PHY 101 Surface Tension Objective Question
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Question

If the adhesive forces between a liquid and a container are greater than the cohesive forces within the liquid, what is the range of the contact angle θ?
Options
A 0° < θ < 90°
Correct Answer
B θ = 90°
C 90° < θ < 180°
D θ = 180°
Correct Answer

Option A is the correct answer.

Detailed Explanation

When adhesive forces dominate, the liquid is attracted to the container wall, causing it to spread and wet the surface. This results in a concave meniscus and a contact angle θ that is less than 90°, specifically between 0° and 90°.

Hint

Stronger attraction to the wall (adhesion) than to itself (cohesion) causes the liquid to climb up the wall, creating a small contact angle.

Question Info

Course: PHY 101
Topic: Surface Tension
Type: Objective
Difficulty: Not specified
Question 714 of 1250
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