. When the open end of an empty bottle is pushed inside the water
1. Water rushes into the bottle.
2. The water enters the bottle when it is tilted slightly.
3. When the bottle is tilted bubbles are seen coming out of the bottle.
4. The bottle remains empty.
(a) 1 only (b) 2and 3 (c) 3 and 4 (d) All the above
(b) When the open end of an empty bottle in pushed inside water the water does not enter into it as it is filled with air. As the bottle is tilted slightly the air comes out and is seen in the form of bubbles. When the air comes out the bottle becomes completely empty and water rushes into it to occupy that empty space.