Advertisements
Advertisements
प्रश्न
In a streamline flow,
(a) the speed of a particle always remains same
(b) the velocity of a particle always remains same
(c) the kinetic energies of all the particles arriving at a given point are the same
(d) the momenta of all the particles arriving at a given point are the same
उत्तर
(c) the kinetic energies of all the particles arriving at a given point are the same
(d) the momenta of all the particles arriving at a given point are the same
In a streamline flow, every fluid particle arriving at a given point has the same velocity v. Thus, the kinetic energies `(1/2"mv"^2)`and momenta (mv) of all particles arriving at a given point are the same, as the mass of a particle is constant.
APPEARS IN
संबंधित प्रश्न
Fill in the blanks using the word(s) from the list appended with each statement:
For a fluid in a steady flow, the increase in flow speed at a constriction follows (conservation of mass / Bernoulli’s principle)
Explain why When we try to close a water tap with our fingers, fast jets of water gush through the openings between our fingers
Water flows through two identical tubes A and B. A volume V0 of water passes through the tube A and 2 V0 through B in a given time. Which of the following may be correct?
(a) Flow in both the tubes are steady.
(b) Flow in both the tubes are turbulent.
(c) Flow is steady in A but turbulent in B.
(d) Flow is steady in B but turbulent in A.
Water is flowing in streamline motion through a tube with its axis horizontal. Consider two points A and B in the tube at the same horizontal level.
(a) The pressures at A and B are equal for any shape of the tube.
(b) The pressures are never equal.
(c) The pressures are equal if the tube has a uniform cross section.
(d) The pressures may be equal even if the tube has a nonuniform cross section.
Along a streamline,
Streamline flow is more likely for liquids with ______.
Which of the following diagrams (Figure) does not represent a streamline flow?
Along a streamline ______.
Streamline flow is more likely for liquids with ______.
- high density.
- high viscosity.
- low density.
- low viscosity.
