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A student is provided with a rubber cylinder and a patch of synthetic fur. The rubber...

A student is provided with a rubber cylinder and a patch of synthetic fur. The rubber cylinder and the patch are electrically neutral. The student rubs the cylinder back and forth along the fur. A short time later, after the cylinder and fur have been placed on insulating stands, the student determines that the fur has a net negative electric charge.

Which of the following claims is correct about the system that contains only the patch of fur?

  • It is an isolated system.

    A

  • It is a closed system.

    B

  • It is an open system.

    C

  • The type of system cannot be determined unless information is known about the net force exerted on the system at any given time.

    D

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