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An oven contains cadmium vapor at a pressure of 2.28 Pa and at a temperature of 550 K. In one wall of the oven there is a slit with a width of 10-5 m and a length of 10-2 m.

On the other side of the wall is a very high vacuum. If one assumes that all the atoms arriving at the slit pass through, what is the atomic beam current?

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