143184 A tank is filled with water of density $1 \mathrm{~g}$ per $\mathrm{cm}^{3}$ and oil of density $0.9 \mathrm{~g}$ per $\mathrm{cm}^{3}$. The height of water layer is $100 \mathrm{~cm}$ and of the oil layer is $400 \mathrm{~cm}$. If $\mathrm{g}=980 \mathrm{~cm} / \mathrm{s}^{2}$, then the velocity of efflux from an opening in the bottom of the tank is:

143185 A water tank, open to the atmosphere, has a leak in it form of a circular hole, located at a height $h$ below the open surface of water. The velocity of the water coming out of the hole is:

143187 A sphere of radius $R$ has a concentric spherical cavity of radius $r$. The relative density of the material of the sphere is $\sigma$. It just floats when placed in tank full of water.
The value of $\frac{R}{r}$ is

143188 The densities of wood and benzene at $0^{\circ} \mathrm{C}$ are $880 \mathrm{kgm}^{-3}$ and $900 \mathrm{kgm}^{-3}$, respectively. The coefficient of volume expansion is $1.2 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for wood and $1.5 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for benzene. Then the temperature at which a piece of wood just sinks in benzene is

143184 A tank is filled with water of density $1 \mathrm{~g}$ per $\mathrm{cm}^{3}$ and oil of density $0.9 \mathrm{~g}$ per $\mathrm{cm}^{3}$. The height of water layer is $100 \mathrm{~cm}$ and of the oil layer is $400 \mathrm{~cm}$. If $\mathrm{g}=980 \mathrm{~cm} / \mathrm{s}^{2}$, then the velocity of efflux from an opening in the bottom of the tank is:

143185 A water tank, open to the atmosphere, has a leak in it form of a circular hole, located at a height $h$ below the open surface of water. The velocity of the water coming out of the hole is:

143187 A sphere of radius $R$ has a concentric spherical cavity of radius $r$. The relative density of the material of the sphere is $\sigma$. It just floats when placed in tank full of water.
The value of $\frac{R}{r}$ is

143188 The densities of wood and benzene at $0^{\circ} \mathrm{C}$ are $880 \mathrm{kgm}^{-3}$ and $900 \mathrm{kgm}^{-3}$, respectively. The coefficient of volume expansion is $1.2 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for wood and $1.5 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for benzene. Then the temperature at which a piece of wood just sinks in benzene is

143184 A tank is filled with water of density $1 \mathrm{~g}$ per $\mathrm{cm}^{3}$ and oil of density $0.9 \mathrm{~g}$ per $\mathrm{cm}^{3}$. The height of water layer is $100 \mathrm{~cm}$ and of the oil layer is $400 \mathrm{~cm}$. If $\mathrm{g}=980 \mathrm{~cm} / \mathrm{s}^{2}$, then the velocity of efflux from an opening in the bottom of the tank is:

143185 A water tank, open to the atmosphere, has a leak in it form of a circular hole, located at a height $h$ below the open surface of water. The velocity of the water coming out of the hole is:

143187 A sphere of radius $R$ has a concentric spherical cavity of radius $r$. The relative density of the material of the sphere is $\sigma$. It just floats when placed in tank full of water.
The value of $\frac{R}{r}$ is

143188 The densities of wood and benzene at $0^{\circ} \mathrm{C}$ are $880 \mathrm{kgm}^{-3}$ and $900 \mathrm{kgm}^{-3}$, respectively. The coefficient of volume expansion is $1.2 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for wood and $1.5 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for benzene. Then the temperature at which a piece of wood just sinks in benzene is

143184 A tank is filled with water of density $1 \mathrm{~g}$ per $\mathrm{cm}^{3}$ and oil of density $0.9 \mathrm{~g}$ per $\mathrm{cm}^{3}$. The height of water layer is $100 \mathrm{~cm}$ and of the oil layer is $400 \mathrm{~cm}$. If $\mathrm{g}=980 \mathrm{~cm} / \mathrm{s}^{2}$, then the velocity of efflux from an opening in the bottom of the tank is:

143185 A water tank, open to the atmosphere, has a leak in it form of a circular hole, located at a height $h$ below the open surface of water. The velocity of the water coming out of the hole is:

143187 A sphere of radius $R$ has a concentric spherical cavity of radius $r$. The relative density of the material of the sphere is $\sigma$. It just floats when placed in tank full of water.
The value of $\frac{R}{r}$ is

143188 The densities of wood and benzene at $0^{\circ} \mathrm{C}$ are $880 \mathrm{kgm}^{-3}$ and $900 \mathrm{kgm}^{-3}$, respectively. The coefficient of volume expansion is $1.2 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for wood and $1.5 \times 10^{-3}{ }^{\circ} \mathrm{C}^{-1}$ for benzene. Then the temperature at which a piece of wood just sinks in benzene is