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Which of the following statements is true? Energy input is always greater than energy output. Magnetic fields are weakest at the poles of a magnet. Magnetic fields can push and pull protons. A change in
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Which of the following statements is true? Energy input is always greater than energy output. Magnetic fields are weakest at the poles of a magnet. Magnetic fields can push and pull protons. A change in acceleration is called velocity.

User Ianbarker
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The energy is a input and a output. 
User CrazyMax
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Energy input is always greater than energy output.

Hope this helps
User Vetuka
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