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Question: The surface tension of soap solution at a temperature \(2.5 \times 10 ^ { - 2 } \mathrm {~N} \mathrm...

The surface tension of soap solution at a temperature 2.5×10−2 N m−12.5 \times 10 ^ { - 2 } \mathrm {~N} \mathrm {~m} ^ { - 1 } The excess pressure inside a bubble of soap solution of radius 6 mm is

A

(a) 12.5 Pa

A

(b) 14.2 Pa

A

(c) 15.5 Pa

A

(d) 16.7 Pa

Explanation

Solution

(d) Here, surface tension,

r = 6 mm = 6×10−36 \times 10 ^ { - 3 }

Excess pressure inside the soap bubble,