The excess pressure inside a soap bubble is assumed to depend only on its surface…

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

The excess pressure

\Delta P

inside a soap bubble is assumed to depend only on its surface tension

S

and radius

r

. Select the option that gives a dimensionally valid proportionality. (a)

\Delta P \propto S\, r

(b)

\Delta P \propto S\, r^{-1}

(c)

\Delta P \propto S^{2}\, r^{-1}

(d)

\Delta P \propto S^{-1}\, r