Concepts Of Physics MCQ Edition [Volume 1]PhysicsSome Mechanical Properties of Matter

Determine the excess pressure inside a drop of mercury having a radius of 2 mm . The surface tension of mercury is given as 0.465 N/m .

Options

A232.5 N/m ^2
B46.5 N/m ^2
C465 N/m ^2
D930 N/m ^2

Correct answer

C. 465 N/m ^2

Step-by-step solution

The excess pressure inside a liquid drop is given by the formula P = 2T R . Given: T = 0.465 N/m R = 2 mm = 2 10⁻³ m Substituting the values in the formula: P = 2 0.465 2 10⁻³ P = 0.465 10^3 P = 465 N/m ^2

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