Two containers have a substantial amount of the air evacuated out of them so that the pressure inside is half the pressure at sea level. One container is in Denver at an altitude of about 6,000 ft and the other is in New Orleans (at sea level). The surface area of the container lid is A = 0.0165 m². The air pressure in Denver is P_D = 81000 Pa. and in New Orleans is P_NO = 100500 Pa. Assume the lid is weightless.

1. What is a expression for the force F_NO required to remove the container lid in New Orleans.

2. Calculate the force F_NO required to lift off the container lid in New Orleans, in newtons.

3. Calculate the force F_D required to lift off the container lid in Denver, in newtons.

4. Is more force required to lift the lid in Denver (higher altitude, lower pressure) or New Orleans (lower altitude, higher pressure)?