Which of the following is a correct description of the base pressure of a vacuum system?...

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Which of the following is a correct description of the base pressure of a vacuum system? no gas particles are left at base pressure at base pressure more particles are in the manifold than in the walls of the chamber base pressure is a mechanical limit of the pumping system O at base pressure no impurities are left in the vacuum chamber Which of the following is a correct description of the base pressure of a vacuum system? no gas particles are left at base pressure at base pressure more particles are in the manifold than in the walls of the chamber base pressure is a mechanical limit of the pumping system O at base pressure no impurities are left in the vacuum chamber