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Let's go more with the scenario you are describing, than the question you start out by asking (which appears to be only peripherally related). Let's assume that a "pebble" is approximately 1 cm3 i...
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Let's go more with the scenario you are describing, than the question you start out by asking (which appears to be only peripherally related). Let's assume that a "pebble" is approximately 1 cm3 i...