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Fluid Mechanics and Surface Tension question bank (Physics)

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Q1.

Three liquids have the same surface tension and densities $\rho_1, \rho_2$,and $\rho_3$ $(\rho_1 \gt \rho_2 \gt \rho_3)$. In three identical capillaries,the rise of the liquid is the same. The corresponding angles of contact $\theta_1, \theta_2$,and $\theta_3$ are related as:

(A)

$\theta_1 \gt \theta_2 \gt \theta_3$

(B)

$\theta_1 \gt \theta_3 \gt \theta_2$

(C)

$\theta_1 \lt \theta_2 \lt \theta_3$

(D)

$\theta_1 = \theta_2 = \theta_3$

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Q2.

Water rises to a height of $10 \,cm$ in a capillary tube. In which of the following conditions will it rise to a height much greater than $10 \,cm$ in a very long capillary tube?

(A)

On the surface of the Moon

(B)

At the North Pole

(C)

In a lift moving up with an acceleration

(D)

On the equator

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