142952 Two capillary tubes of same radius $r$ but of lengths $l_{1}$ and $l_{2}$ are fitted in parallel to the bottom of a vessel. The pressure head is $p$. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?
142953 Water rises to a height of $10 \mathrm{~cm}$ in capillary tube and mercury falls to a depth of $3.1 \mathrm{~cm}$ in the same capillary tube. If the density of mercury is $\mathbf{1 3 . 6}$ and the angle of contact for mercury is $135^{\circ}$, the approximate ratio of surface tensions of water and mercury is
142954 The angle of contact between glass and water is $0^{\circ}$ and it rises in a capillary up to $6 \mathrm{~cm}$ when its surface tension is $70 \mathrm{dyne} / \mathrm{cm}$. Another liquid of surface tension $140 \mathrm{dyne} / \mathrm{cm}$, angle of contact $60^{\circ}$ and relative density 2 will rise in the same capillary by-
142952 Two capillary tubes of same radius $r$ but of lengths $l_{1}$ and $l_{2}$ are fitted in parallel to the bottom of a vessel. The pressure head is $p$. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?
142953 Water rises to a height of $10 \mathrm{~cm}$ in capillary tube and mercury falls to a depth of $3.1 \mathrm{~cm}$ in the same capillary tube. If the density of mercury is $\mathbf{1 3 . 6}$ and the angle of contact for mercury is $135^{\circ}$, the approximate ratio of surface tensions of water and mercury is
142954 The angle of contact between glass and water is $0^{\circ}$ and it rises in a capillary up to $6 \mathrm{~cm}$ when its surface tension is $70 \mathrm{dyne} / \mathrm{cm}$. Another liquid of surface tension $140 \mathrm{dyne} / \mathrm{cm}$, angle of contact $60^{\circ}$ and relative density 2 will rise in the same capillary by-
142952 Two capillary tubes of same radius $r$ but of lengths $l_{1}$ and $l_{2}$ are fitted in parallel to the bottom of a vessel. The pressure head is $p$. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?
142953 Water rises to a height of $10 \mathrm{~cm}$ in capillary tube and mercury falls to a depth of $3.1 \mathrm{~cm}$ in the same capillary tube. If the density of mercury is $\mathbf{1 3 . 6}$ and the angle of contact for mercury is $135^{\circ}$, the approximate ratio of surface tensions of water and mercury is
142954 The angle of contact between glass and water is $0^{\circ}$ and it rises in a capillary up to $6 \mathrm{~cm}$ when its surface tension is $70 \mathrm{dyne} / \mathrm{cm}$. Another liquid of surface tension $140 \mathrm{dyne} / \mathrm{cm}$, angle of contact $60^{\circ}$ and relative density 2 will rise in the same capillary by-
142952 Two capillary tubes of same radius $r$ but of lengths $l_{1}$ and $l_{2}$ are fitted in parallel to the bottom of a vessel. The pressure head is $p$. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?
142953 Water rises to a height of $10 \mathrm{~cm}$ in capillary tube and mercury falls to a depth of $3.1 \mathrm{~cm}$ in the same capillary tube. If the density of mercury is $\mathbf{1 3 . 6}$ and the angle of contact for mercury is $135^{\circ}$, the approximate ratio of surface tensions of water and mercury is
142954 The angle of contact between glass and water is $0^{\circ}$ and it rises in a capillary up to $6 \mathrm{~cm}$ when its surface tension is $70 \mathrm{dyne} / \mathrm{cm}$. Another liquid of surface tension $140 \mathrm{dyne} / \mathrm{cm}$, angle of contact $60^{\circ}$ and relative density 2 will rise in the same capillary by-