As the temperature of water increases, its viscosity
  • A
    Remains unchanged
  • B
    Decreases
  • C
    Increases
  • D
    Increases or decreases depending on the external pressure
Easy
art

Download our app
and 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

  • 1
    A hydraulic press can lift $100\, kg$ when a mass $'m'$ is placed on the smaller piston. It can lift ......... $kg$ when the diameter of the larger piston is increased by $4$ times and that of the smaller piston is decreased by $4$ times keeping the same mass $'m'$ on the smaller piston.
    View Solution
  • 2
    An aeroplane of mass $3 \times 10^4\, kg$ and total wing area of $120\, m^2$ is in a level flight at some height. The difference in pressure between the upper and lower surfaces of its wings in kilopascals is $(g=10\,m/s^2)$
    View Solution
  • 3
    A uniform solid cylinder of density $0.8$ $g/cm^3$ floats in equilibrium in a combination of two non-mixing liquid $A$ and $B$ with its axis vertical. The densities of liquid $A$ and $B$ are $0.7$ $g/cm^3$ and $1.2$ $gm/cm^3$. The height of liquid $A$ is $h_A = 1.2$ $cm$ and the length of the part of cylinder immersed in liquid $B$ is $h_B = 0.8$ $cm$. Then the length part of the cylinder in air is ....... $cm$
    View Solution
  • 4
    $Assertion :$ The velocity of flow of a liquid is smaller when pressure is larger and vice-versa.
    $Reason :$ According to Bernoulli’s theorem, for the stream line flow of an ideal liquid, the total energy per unit mass remains constant.
    View Solution
  • 5
    $Assertion : $ Machine parts are jammed in winter.
    $Reason :$ The viscosity of lubricant used in machine parts increase at low temperatures.
    View Solution
  • 6
    A liquid having coefficient of viscosity $0.02$ decapoise is filled in a container of cross-sectional area $20 \,m ^2$. If viscous drag between two adjacent layers in flowing is $1 \,N$, then velocity gradient is ........ $s ^{-1}$
    View Solution
  • 7
    A thin uniform tube is bent into a circle of radius $r$ in the virtical plane. Equal volumes of two immiscible liquids, whose densities are ${\rho _1}$ and ${\rho _2}\left( {{\rho _1} > {\rho _2}} \right)$ fill half the circle. The angle $\theta$ between the radius vector passing through the common interface and the vertical is
    View Solution
  • 8
    A horizontal pipe line carries water in a streamline flow.At a point along the tube where the cross-sectional area is $10^{-2}$ $m^2$, the water velocity is $2$ $ms^{^{-1}}$ and the pressure is $8000 $ $Pa$. The pressure of water at another point where the cross-sectional area is $0.5$ $\times 10^{-2}$ $m^2$ is ........  $Pa$
    View Solution
  • 9
    A steady flow of water passes along a horizontal tube from a wide section $X$ to the narrower section $Y$, see figure. Manometers are placed at $P$ and $Q$ at the sections. Which of the statements $A, B, C, D, E$ is most correct?
    View Solution
  • 10
    A nurse measures the blood pressure of a seated patient to be $190 \,mm$ of $Hg$.
    View Solution