A poker is a long thin tool used to move pieces of coal or logs burning in a fire. To be as safe as possible, the poker should be made from a material that

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Explanation:

A poker that will effectively and safely function to move pieces of coal or logs in a burning fire must be fireproof itself. Hence, to be as safe as possible, such poker should be made from a material that is fireproof and that does not conduct a lot of heat. Otherwise, the poker will catch fire/becomes too hot during the course of usage.

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0.11 m/s and 0.28 m/s should be correct