Rayleigh bubble collapse pressure integration derivation

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bksree
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Hi
Attached is an extract of a paper by Lord Rayleigh on pressure generated during collapse of a bubble in a liquid. Will someone please explain how the RHS of equation (2) in the attachment is obtained ?

TIA
 

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Use eq (1) to Substitute [itex]\frac{UR^2}{r^2}[/itex] for [itex]u[/itex] in the integral. Doesn't the integration work out after that?
 
Stephen
Thank you. Got it now. On hindsight, what a silly question to ask.

Thanks again