Which of the following is an extensive property? a. melting point b. hardness c. color d. volume e. temperature

The answer is d volume. This is because the melting point, color, temperature are all intensive properties. While hardness is neither extensive or intensive. Volume is the only one that is considered an extensive property.

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they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.