Skip to content
Login Register

Practice question

MCQ

Question

A bubble of radius 6.5mm is blown at 55cm depth in water (ρ\=1000kg/m3, S\=0.0727N/m). What is the total pressure inside? (Take Pa\=1.01×105Pa, g\=9.8m/s2)

Options

Choose one · Correct answer highlighted

Explanation

Pi = Pa+ρgh+2Sr. Pa = 1.01×105Pa, ρgh = 1000×9.8×0.55 = 5390Pa. 2Sr = 2×0.07276.5×10−3 = 22.34Pa. Pi = 1.01×105+5390+22.34 = 1.06392×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.06 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.

Discussion

Comments

0 comments

No comments yet. Be the first to start the discussion.

Related blogs

Guides and insights connected to this topic