A carton of juice remains intact even after you have sucked out all the drink from it. please explain
didn't air replace the juice, and that air is at atmopsheric pressure?
After the juice is sucked out, air occupy the space and the perssure outside and pressure inside is equal. Hence it remains intact.
The reason a carton of juice remains intact even after you have sucked out all the drink from it is due to the principle of air pressure and structural stability.
Inside the carton, there is both juice and air. When you suck out the juice, you create a vacuum inside the carton, which means that you have removed all the air as well. However, the carton is made up of materials that are designed to maintain their structural integrity.
The carton is typically made from layers of paperboard, plastic film, and sometimes aluminum foil. These layers are bonded together to create a strong and flexible container. This structure allows the carton to withstand external forces and maintain its shape even when the internal pressure changes.
When you suck out the juice, the outside air pressure is higher than the vacuum you created inside the carton. This higher air pressure presses against the carton from the outside, effectively squeezing it and preventing it from collapsing.
In simpler terms, the carton remains intact because the pressure from the air outside the carton is exerted on the carton walls, counteracting the vacuum inside. The balance between the higher pressure outside and the absence of pressure inside keeps the carton from collapsing.
So, while it may appear as though the carton is empty and there should be no reason for it to remain intact, it is the external air pressure that prevents it from collapsing.