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Then, let me also measure the new coordinate this way, called h,
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which is the radial distance away from the RE.
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This is RE, this is RE + h.
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Then, I blow up this box.
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What do you find?
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I blow up the box with my newly shifted origin.
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Here is h,
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and here is the potential energy, looking like a straight line.
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And if you're lucky,
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the slope of the straight line should be what?
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What should be the slope,
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so we can reconcile everything?