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Explain why a soft plastic bag weighs t...

Explain why a soft plastic bag weighs the same when empty or when filled with air at atmospheric pressure ? Would the weights be the same if measured in vacuum ?

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SL ARORA-Mechanical Properties of fluids-Exercise
  1. We can use water instead of mercury in a barometer.

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  2. Does Archimede's principle hold in a vessel in free fall?

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  3. Explain why a soft plastic bag weighs the same when empty or when fil...

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  4. It is difficult to swim in sea water than in river water.

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  5. A man is sitting in a boat which is floating in a pond. If the man dri...

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  6. A block of ice in which a piece of stone is embedded is floating on wa...

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  7. A boat floating in a water tank is carrying a number of large stones. ...

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  8. Statement-1: A parachute descends slowly whereas a stone dropped from ...

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  9. The density of water is more than the density of air. Even then the cl...

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  10. A mercury barometer always reads less than actual pressure.

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  11. A large force is required to draw apart normally two glass plates encl...

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  12. Oil spreads on cold water but remains as drop on hot water.

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  13. Tow soap bubbles A and B are formed at the two open ends of a tube. Th...

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  14. It becomes easier to spray the water in which some soap is dissolved. ...

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  15. does angle of contact depends on the inclination of the solid surface ...

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  16. While sewing, a person often wets the end of a thread before, trying t...

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  17. The force required by a man to move his legs immersed in water is smal...

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  18. Explain why (a). The angle of contact of mercury with galss is obtus...

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  19. Whan air is blown in between two balls suspended close to each other, ...

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  20. Define the term fluid.

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