Question

Q.7. A soap bubble of radius 10-2 m is formed. The surface tension of the soap
bubble is 0.04 N/m. Find excess of pressure inside the bubble​

Answer 1

$\huge\underline{\underline{\bf \orange{Question-}}}$

A soap bubble of radius 10-2 m is formed. The surface tension of the soap bubble is 0.04 N/m. Find excess of pressure inside the bubble

$\huge\underline{\underline{\bf \orange{Solution-}}}$

$\large\underline{\underline{\sf Given:}}$

• Radius (R) = ${\sf 10^{-2}m}$
• Surface Tension of soap (S) = 0.04N/m

$\large\underline{\underline{\sf To\:Find:}}$

• Excess Pressure inside bubble.

Excess Pressure inside bubble is given by ➝

✪$\large{\boxed{\bf \blue{P=\dfrac{4S}{R}}}}$

$\implies{\sf \dfrac{4×0.04}{10^{-2}}}$

$\implies{\sf \dfrac{0.16}{10^{-2}} }$

$\implies{\sf 0.16×10^2}$

$\implies{\bf \red{Excess\: Pressure (P)=16N/m^2}}$

$\huge\underline{\underline{\bf \orange{Answer-}}}$

Excess of pressure inside the bubble is ${\bf \red{16N/m^2}}$.