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calculate the force required to evacuate a cylinder to 5 hg?
Hi,
How do you calculate the force in foot pounds or Nm required to evacuate a 200mm x 50mm cylinder to a vacuum of 2.5 psi or 5" hg?
Arnak
1 Answer
- ?Lv 77 years agoFavorite Answer
Talk about mixing concepts and units.
The only way force would apply would be if the problem were stated as "A cylinder 50mm in diameter contains a piston with the end a certain distance from the closed end with air at atmospheric pressure. The piston is pulled out until the chamber is at 2.5 psi and is 200mm long - what is the force on the piston to hold this position?"
Evacuation would be work, not just force and involve distance.units.
