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Explain why water does not run out of a ...

Explain why water does not run out of a dropper unless it's rubber bulb is pressed.

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Because the time till rubber is not pressed the pressure inside dropper is equal to pressure outside the dropper .But when rubber is pressed, pressure increases and the water goes outside the dropper.
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KUMAR PRAKASHAN-MECHANICAL PROPERTIES OF FLUIDS -SECTION -C (Objective Questions) (VSQs)
  1. Explain why is it easy to cut an apple with a sharp knife than with a ...

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  2. Why is walking barefooted on a sharp gravel (grift) road difficult ?

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  3. Explain why water does not run out of a dropper unless it's rubber bul...

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  4. Why two holes are made to empty an oil tin ?

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  5. Why bottom filled with liquid breakdown when cork is hit ?

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  6. Give two uses of Pascal's law

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  7. How mush force is exerted on our body at atmospheric pressure ?

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  8. What is 1 Torr pressure ?

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  9. What is 1 bar ?

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  10. Write relation between torr and millibar .

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  11. On what factors does the pressure of any place depends ?

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  12. Express 1 atm pressure into N//m^(2) and bar.

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  13. Why does food cook faster in a pressure cooker ?

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  14. Explain that you can't make a decent cup of tea up on a mountain ?

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  15. When air plane fly at higher altitude it is not right to keep a founta...

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  16. Mountaineers suffer from nose bleeding (nostril ) at higher altitudes.

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  17. It is difficult to heal wound on mountain.

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  18. Straws are used to take soft drinks . Why ?

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  19. Explain why are water storage dam walls thicker at the bottom.

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  20. Why does an air bubble form in water grow in size from bottom when it ...

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