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Answer is 2.

water go in through Q, and purge air out of the bottle through P.

so air will not go in the bottle.

0 Replies 1 Like ✔Accepted Answer

Answer is 2.

Hole P allows air to escape from the bottle. Water will enter the bottle thro’ Q as the water pressure at Q is greater than the air pressure in the bottle. The water will stop entering the bottle until the water level in the bottle is the same as the water level outside the bottle. 

Physics concept: Pressure at all points along the same horizontal level in a stationary liquid is the same.

Mrs Setho here. Physics tutor, former teacher of DHS and VS. Can email to me thro’ my tuition advert.  Hopefully, u can understand my explanation. 😊

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The answer is 2.*water* and *through*

If the answer from the paper(2) is correct, why can’t air enter hole p?? And if you are correct, why air can enter hole P? Hot air rises, right?I am confused!Please explain to me! Thanks!

0 Replies 1 Like

Answer is 2.

Hole P allows air to escape from the bottle. Water will enter the bottle thro’ Q as the water pressure at Q is greater than the air pressure in the bottle. The water will stop entering the bottle until the water level in the bottle is the same as the water level outside the bottle. 

Physics concept: Pressure at all points along the same horizontal level in a stationary liquid is the same.

Mrs Setho here. Physics tutor, former teacher of DHS and VS. Can email to me thro’ my tuition advert.  Hopefully, u can understand my explanation. 😊

0 Replies 0 Likes
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