A liquid of density $10^3 \,kg / m ^3$ and coefficient of viscosity $8 \times 10^{-2} \;decapoise$ is flowing in a tube of radius $2 \,cm$ with speed $2 \,m / s$. The Reynold's number is ..........
Easy
Download our app for free and get started
(b)
Reynold's number
$=\frac{\rho V d}{\eta}$
$\eta =8 \times 10^{-2} \text { decapoise. }$
$R.N. =\frac{1000 \times 2 \times 4 \times 10^{-2}}{8 \times 10^2}$
$=1000$
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1A closed vessel have a small hole in one face of vessel near the bottom as shown. The velocity of water coming out from the given hole at given instant is ....... $m/s$View Solution
- 2View SolutionA cork is submerged in water by a spring attached to the bottom of a bowl. When the bowl is kept in an elevator moving with acceleration downwards, the length of spring
- 3Water is moving with a speed of $5.18 ms^{-1}$ through a pipe with a cross-sectional area of $4.20 cm^2$. The water gradually descends $ 9.66 m $ as the pipe increase in area to $7.60 cm^2$. The speed of flow at the lower level is ....... $ms^{-1}$View Solution
- 4A manometer connected to a closed tap reads $4.5 \times {10^5}$ pascal. When the tap is opened the reading of the manometer falls to $4 \times {10^5}$ pascal. Then the velocity of flow of water is ........ $m{s^{ - 1}}$View Solution
- 5The density of the atmosphere is $1.29\, kg/m^3$, then how high would the atmosphere extend ? $(g = 9.81\, m/sec^2)$ ........ $km$View Solution
- 6A ball of mass $m$ and radius $ r $ is gently released in a viscous liquid. The mass of the liquid displaced by it is $m' $ such that $m > m'$. The terminal velocity is proportional toView Solution
- 7A manometer connected to a closed tap reads $4.5 \times {10^5}$ pascal. When the tap is opened the reading of the manometer falls to $4 \times {10^5}$ pascal. Then the velocity of flow of water is ........ $m{s^{ - 1}}$View Solution
- 8In the figure shown, the heavy cylinder (radius $R$) resting on a smooth surface separates two liquids of densities $2\ \rho$ and $3\ \rho$ . The height $‘h’$ for the equilibrium of cylinder must beView Solution
- 9Air of density $1.2\,kg\,m^{-3}$ is blowing across the horizontal Wings of an aeroplane in such a way that its speeds above and below the wings are $150\,ms^{-1}$ and $100\,ms^{-1}$, respectively. The pressure difference between the upper and lower sides of the Wings, is ........ $Nm^{-2}$View Solution
- 10A barometer kept in an elevator reads $76 \,cm$ when it is at rest. If the elevator goes up with some acceleration, the reading will be .......... $cm$View Solution