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If we know the total energy in a system is 30 J, and we know the PE is 20 J. What is the KE? Please show your work.
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If we know the total energy in a system is 30 J, and we know the PE is 20 J. What is the KE?

Please show your work.

User Joe Hickey
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Can you give more description ??

User Kingtorus
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