Question: Would increasing the ejection speed from 12 km/s to 13 km/s change the residual speed by more than, less than, or the same amount as

Would increasing the ejection speed from 12 km/s to 13 km/s change the residual speed by more than, less than, or the same amount as increasing the ejection speed from 15 km/s to 16 km/s?

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