1.

Find the radius of the soap bubble 44xx10^(-6)J of work of the done in blowing the soap, bubble. Surface tension of soap solution 7xx10^(-2) Nm^(-1)

Answer»

SOLUTION :Work done `W=44xx10^(-6)J`
If r I the radius of the SOAP bubble
SURFACE are of the soap bubble `=8pir^(2)`
Work done in blowing soap bubble (W)= surface area of the bubble `xx` surface tension `W=8pir^(2).S`
`:.r^(2)=W/(8piS)r=sqrt(W/(8piS))=sqrt((44xx10^(-6))/(8xx22/7xx7xx10^(-2)))`
`=sqrt(1/4xx10^(-4)),r=0.005m` (or) 5mm


Discussion

No Comment Found