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Why does the liquid rise in a syringe wh...

Why does the liquid rise in a syringe when its piston is pulled up?

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A syringe of diameter D = 8 mm and having a nozzie of diameter d = 2 mm is placed horizontally at a height of 1.25 m as shown in the figure . An incompressible and non - viscous liquid is filled in syringe and the piston is moved at speed of 0.25 m/s .Find the range of liquid jet on the ground.

A piston is fitted in a cylindrical tube of small cross section with the other end of the tube open. The tube resonates with a tuning fork of frequency 512 Hz. The piston is gradually pulled out of the tube and it is found that a second resonance occurs when the piston is pulled out through a distance of 32.0 cm. Calculate the speed of sound in the air of the tube.

Why does the temperature of a gas increase when it is suddenly compressed?

Why does the boiling point of liquid rise on increasing pressure ?

How does the density of a liquid change with the rise in its temperature?

A syringe containing water is held horizontally with its nozzle at a height h above the ground as shown in fig the cross sectional areas of the piston and the nozzle are A and a respectively the piston is pushed with a constant speed v. Find the horizontal range R of the stream of water on the ground.

A solid sphere of radius R made of a material of bulk modulus B is surrounded by a liquid in a cylindrical container. A massless piston of area A (the area of container is also A ) floats on the surface of the liquid. When a mass M is placed on the piston to compress the liquid , fractional change in radius of the sphere is (Mg)/(alpha AB) . Find the value of alpha .

A solid sphere of radius R made of a material of bulk modulus K is surrounded by a liquid in a cylindrical container. A massless piston of area A floats on the surface of the liquid. When a mass M is placed on the piston to compress the liquid the fractional change in the radius of the sphere, deltaR//R , is .............

A spray gun is shown in the figure where a piston pushes air out of a nozzle. A thin tube of uniform cross section is connected to the nozzle. The other end of the tube is in a small liquid container. As the piston pushes air through the nozzle, the liquid from the container rises into the nozzle and is sprayed out. For the spray gun shown, the radii of the piston and the nozzle are 20mm and 1mm respectively. The upper end of the container is open to the atmosphere. If the density of air is rho_a , and that of the liquid rho_l , then for a given piston speed the rate (volume per unit time) at which the liquid is sprayed will be proportional to

To what height does the liquid rise in a capillary tube of radus 0.25 mm, when dipped in a liquid of density 0.8 xx 10^(3) kg m^(-3) and surface tension 0.05 N m^(-1) ? Given (cos theta = 0.4)

ICSE-PRESSURE IN FLUIDS AND ATMOSPHERIC PRESSURE-Exercise -4(B)
  1. Describe an experiment to demonstrate that air exerts pressure.

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  2. Explain the following : (i) A balloon collapses when air is removed ...

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  3. Why does the liquid rise in a syringe when its piston is pulled up?

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  4. How is water drawn up from a well by a water pump ?

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  5. A partially inflated balloon is placed inside a bell jar connected to ...

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  6. What is the purpose of a barometer ?

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  7. What is a barometer ? How is a simple barometer constructed ?

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  8. Explain how is the height of mercury column in the tube of a simple ba...

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  9. Illustrate with the help of a lebelled diagram of a simple barometer ...

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  10. Why is the barometric height used as a unit to express the atmosphric ...

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  11. What is meant by the statement “the atmospheric pressure at a place is...

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  12. How will you show that there is vacuum above the surface of mercury i...

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  13. How is the barometric height of a simple barometer affected if (a) i...

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  14. State two uses of a barometer.

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  15. State two advantages of use of mercury as a barometric liquid.

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  16. Water is not used as a barometeric liquid because :

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  17. Mention two demerits of a simple barometer and state how they are remo...

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  18. Draw a simple labelled diagram of a Fortin barometer and state how it ...

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  19. State two advantages of an aneroid barometer over a simple barometer.

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  20. How is the reading of a barometer affected when it is taken to (i) a ...

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