Question

How you can show the presence of air in a bottle that looks empty

Answer 1

presence of the year in in bottle that looks empty can be shown by taking an empty bottle and putting some drops of warm water inside it .

at first pour a little warm water in the bottle

then tightly close the cap of the bottle

now you can see that the volume the bottle except the water is empty because it is full of air .press the button gently and check if it can be pressed .

keep the bottle as it is for sometime and after some time again press the bottle ...now you will notice that the bottle cannot be pressed slightly also because of the air pressure that is created from the air inside ,thus we can show the presence of air in a bottle that looks empty .......

hope this helped you...

Answer 2

take an empty bottle

try to put air in the bottle with your mouth

you will not be able to put air in it

as it has air in it from first