Q.7. A soap bubble of radius 10-2 m is formed. The surface tension of

1.	Q.7. A soap bubble of radius 10-2 m is formed. The surface tension of the soapbubble is 0.04 N/m. Find excess of pressure inside the bubble
Answer» $\huge\underline{\underline{\bf \orange{Question-}}}$ 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 ${\bf \red{16N/m^2}}$ .