Assertion :A liquid will flow faster and more smoothly from a sealed can when two holes are punched in the can than when one hole is punched. Reason: The flow becomes streamlined with two holes rather than with one hole.
Assertion :A liquid will flow faster and more smoothly from a sealed can when two holes are punched in the can than when one hole is punched. Reason: The flow becomes streamlined with two holes rather than with one hole.
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
When a single hole is punched, gulping of water takes place. Air is being sucked into the bottle and temporarily halting the flow through the nozzle. When the bottle is filled with water, it is at a particular pressure. When you turn it over and some water leaves, the pressure is now lower in the bottle.
Once the pressure in the bottle is lower than atmospheric pressure, air forces it's way back into the bottle. This equalizes the pressure and water flows again. Then the pressure drops, air gets sucked in, and so on. Eventually, all the water is gone and the bottle is filled with air at the same pressure as the atmosphere.
To avoid this gulping, and cause a streamline motion, we can punch a hole in the bottom to admit the air flow, and restore the rapid water flow.
When a single hole is punched, gulping of water takes place. Air is being sucked into the bottle and temporarily halting the flow through the nozzle. When the bottle is filled with water, it is at a particular pressure. When you turn it over and some water leaves, the pressure is now lower in the bottle.
Once the pressure in the bottle is lower than atmospheric pressure, air forces it's way back into the bottle. This equalizes the pressure and water flows again. Then the pressure drops, air gets sucked in, and so on. Eventually, all the water is gone and the bottle is filled with air at the same pressure as the atmosphere.
To avoid this gulping, and cause a streamline motion, we can punch a hole in the bottom to admit the air flow, and restore the rapid water flow.
