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प्रश्न
Describe the crushing tin can experiment. What do you conclude from this experiment?
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उत्तर
Take a tin-can having an airtight cap (screw cap). Remove cap and boil some water in it, so that steam comes out and in this way air from inside goes out. While boiling replace the cap and allow it to cool. Vapours inside condense and form water creating a vacuum above them. We see the can crumbles due to air pressure from outside. This proves that air exerts pressure.
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संबंधित प्रश्न
What force acting on an area of 0.5 m2 will produce a pressure of 500 Pa ?
Fill in the blank with suitable word :
In fluids (liquids and gases), pressure acts in....................directions, and pressure.................as the depth increases.
A liquid exerts pressure in all directions.
Higher we go, greater is the air pressure.
Liquid pressure decreases with the decrease of depth.
The size of an air bubble rising up in water ______.
State whether true or false. If false, correct the statement.
The shape of an object helps to determine whether the object will float or not
All flowing substances such as liquids or gases are called fluids.
Water (or) liquids exert pressure on ______.
A solid floats in liquid with a portion of it being submerged. Then ______.
- The liquid exerts an upthrust equal to the weight of the solid
- The weight of the dispersed liquid is equal to the weight of solid
- Solid exerts a force equal to its weight on liquid
