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The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap bubble of surface area 40 cm², in joules is
Options
(a) 1.2×10⁻⁴
(b) 2.4×10⁻⁴
(c) 12×10⁻⁴
(d) 24×10⁻⁴
Correct Answer:
2.4×10⁻⁴
Explanation:
Given: Surface tension of a soap solution,
T = 0.03 N/m
Surface area, A = 40 cm² = 40 x 10⁻⁴ m²
Since the soap has two surfaces,
.·. Work done, W = T x 24
= 0.03 x 2 40 x 10⁻⁴ = 2.4 x 10⁻⁴J
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In an ammeter, 0.2% of main current passes through the galvanometer
- The horizontal range and maximum height of a projectile are equal.The angle of projection
- A satellite of mass m revolves around the earth of radius R at a height x from
- A 1 kg particle strikes a wall with velocity 1 m/s at an angle 30° and reflects
- The mass of a ⁷₃ Li nucleus is 0.042 u less than the sum of the masses of all its nucleons
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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