A uniform spherical ball of mass m and radius r is dropped in liquid o – InterviewSolution

1.	A uniform spherical ball of mass m and radius r is dropped in liquid of coefficient of viscosity η. Density of the liquid is ρ, whereas density of ball is 2ρ. The de-Broglie wavelength of the ball when it is moving with terminal speed is 2βπhηrm2g. Find β. (h= Planck's constant)
Answer» A uniform spherical ball of mass $m$ and radius $r$ is dropped in liquid of coefficient of viscosity $η$ . Density of the liquid is $ρ$ , whereas density of ball is $2 ρ$ . The de-Broglie wavelength of the ball when it is moving with terminal speed is $\frac{2 β π h η r}{m^{2} g}$ . Find β. ( $h =$ Planck's constant)

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