Apartially evacuated airtight container has a tight-fitting lid of surface area 79.9 cm2 and negligible mass. if the force required to remove the lid is 388 n and the atmospheric pressure is 1.00 × 105 pa, what is the air pressure in the container before it is opened?

Explanation:

As we know that the air container is fixed by the lid on it and it is removed by external force

F = 388 N

now this external force must be same as the force due to pressure difference of the object

so it is given as

here we know that

here we have

now pressure is given as

your answer would be fusion

frequency or wavelenth of em radiation in a vacuum