An annular metal ring of inner radius 7 cm and outer radius 14 cm and negligible weight is floating on the surface of a liquid if surface tensiton of liquid is `0.08Nm^(-1)` calculate the force required to detach it it from liquid surface.

Explanation

To solve the problem of calculating the force required to detach an annular metal ring from the surface of a liquid, we can follow these steps:

### Step 1: Understand the Problem
We have an annular ring with an inner radius \( r_1 = 7 \, \text{cm} \) and an outer radius \( r_2 = 14 \, \text{cm} \) floating on the surface of a liquid with a surface tension \( \gamma = 0.08 \, \text{N/m} \). We need to find the force required to detach it from the liquid surface.

### Step 2: Convert Units
Convert the radii from centimeters to meters:
- Inner radius \( r_1 = 7 \, \text{cm} = 0.07 \, \text{m} \)
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