143287 A liquid is flowing through a tube of diameter $9 \mathrm{~mm}$ with a speed of $10 \mathrm{~cm} . \mathrm{s}^{-1}$. if this tube is connected to a narrow tube in which the liquid flows with a speed of $90 \mathrm{~cm} . \mathrm{s}^{-1}$, then the diameter of narrow tube is
143288
A steady flow of a liquid of density $\rho$ is shown is figure. At point 1 , the area of cross-section is $\mathbf{A A}$ and speed of flow of liquid is $\sqrt{2} \mathrm{~ms}^{-1}$. $\mathrm{At}$ point 2 , the area of cross-section is $A$. Between the points 1 and 2, the pressure difference is $100 \mathrm{Nm}^{-2}$ and the height difference is $10 \mathrm{~cm}$. The value of $\rho$ is
$\text { (Acceleration due to gravity }=10 \mathrm{~m}^{-2} \text { ) }$
143289 A motor of power $P_{0}$ is used to deliver water at a certain rate through a given horizontal pipe. To increase the rate of flow of water through the same pipe $\mathrm{n}$ times, the power of the motor is increased to $P_{1}$. The ratio of $P_{1}$ to $P_{0}$ is
143291 A wind with a speed $40 \mathrm{~m} . \mathrm{s}^{-1}$ blows parallel to the roof of a house. Area of the roof is $250 \mathrm{~m}^{2}$. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and direction of the force will be $\quad\left(\rho_{\text {air }}=1.2 \mathrm{~kg} . \mathrm{m}^{-3}\right)$
143287 A liquid is flowing through a tube of diameter $9 \mathrm{~mm}$ with a speed of $10 \mathrm{~cm} . \mathrm{s}^{-1}$. if this tube is connected to a narrow tube in which the liquid flows with a speed of $90 \mathrm{~cm} . \mathrm{s}^{-1}$, then the diameter of narrow tube is
143288
A steady flow of a liquid of density $\rho$ is shown is figure. At point 1 , the area of cross-section is $\mathbf{A A}$ and speed of flow of liquid is $\sqrt{2} \mathrm{~ms}^{-1}$. $\mathrm{At}$ point 2 , the area of cross-section is $A$. Between the points 1 and 2, the pressure difference is $100 \mathrm{Nm}^{-2}$ and the height difference is $10 \mathrm{~cm}$. The value of $\rho$ is
$\text { (Acceleration due to gravity }=10 \mathrm{~m}^{-2} \text { ) }$
143289 A motor of power $P_{0}$ is used to deliver water at a certain rate through a given horizontal pipe. To increase the rate of flow of water through the same pipe $\mathrm{n}$ times, the power of the motor is increased to $P_{1}$. The ratio of $P_{1}$ to $P_{0}$ is
143291 A wind with a speed $40 \mathrm{~m} . \mathrm{s}^{-1}$ blows parallel to the roof of a house. Area of the roof is $250 \mathrm{~m}^{2}$. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and direction of the force will be $\quad\left(\rho_{\text {air }}=1.2 \mathrm{~kg} . \mathrm{m}^{-3}\right)$
143287 A liquid is flowing through a tube of diameter $9 \mathrm{~mm}$ with a speed of $10 \mathrm{~cm} . \mathrm{s}^{-1}$. if this tube is connected to a narrow tube in which the liquid flows with a speed of $90 \mathrm{~cm} . \mathrm{s}^{-1}$, then the diameter of narrow tube is
143288
A steady flow of a liquid of density $\rho$ is shown is figure. At point 1 , the area of cross-section is $\mathbf{A A}$ and speed of flow of liquid is $\sqrt{2} \mathrm{~ms}^{-1}$. $\mathrm{At}$ point 2 , the area of cross-section is $A$. Between the points 1 and 2, the pressure difference is $100 \mathrm{Nm}^{-2}$ and the height difference is $10 \mathrm{~cm}$. The value of $\rho$ is
$\text { (Acceleration due to gravity }=10 \mathrm{~m}^{-2} \text { ) }$
143289 A motor of power $P_{0}$ is used to deliver water at a certain rate through a given horizontal pipe. To increase the rate of flow of water through the same pipe $\mathrm{n}$ times, the power of the motor is increased to $P_{1}$. The ratio of $P_{1}$ to $P_{0}$ is
143291 A wind with a speed $40 \mathrm{~m} . \mathrm{s}^{-1}$ blows parallel to the roof of a house. Area of the roof is $250 \mathrm{~m}^{2}$. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and direction of the force will be $\quad\left(\rho_{\text {air }}=1.2 \mathrm{~kg} . \mathrm{m}^{-3}\right)$
143287 A liquid is flowing through a tube of diameter $9 \mathrm{~mm}$ with a speed of $10 \mathrm{~cm} . \mathrm{s}^{-1}$. if this tube is connected to a narrow tube in which the liquid flows with a speed of $90 \mathrm{~cm} . \mathrm{s}^{-1}$, then the diameter of narrow tube is
143288
A steady flow of a liquid of density $\rho$ is shown is figure. At point 1 , the area of cross-section is $\mathbf{A A}$ and speed of flow of liquid is $\sqrt{2} \mathrm{~ms}^{-1}$. $\mathrm{At}$ point 2 , the area of cross-section is $A$. Between the points 1 and 2, the pressure difference is $100 \mathrm{Nm}^{-2}$ and the height difference is $10 \mathrm{~cm}$. The value of $\rho$ is
$\text { (Acceleration due to gravity }=10 \mathrm{~m}^{-2} \text { ) }$
143289 A motor of power $P_{0}$ is used to deliver water at a certain rate through a given horizontal pipe. To increase the rate of flow of water through the same pipe $\mathrm{n}$ times, the power of the motor is increased to $P_{1}$. The ratio of $P_{1}$ to $P_{0}$ is
143291 A wind with a speed $40 \mathrm{~m} . \mathrm{s}^{-1}$ blows parallel to the roof of a house. Area of the roof is $250 \mathrm{~m}^{2}$. Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and direction of the force will be $\quad\left(\rho_{\text {air }}=1.2 \mathrm{~kg} . \mathrm{m}^{-3}\right)$