Question

why is it more difficult to burn some combustible substance than others ??​

Answer 1

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It is more difficult to burn some combustible substances than others because different substances catch fire at different temperatures. Some substances have a low ignition temperature; therefore, they can catch fire more easily than others.

Answer 2

Answer:

it is more difficult to burn some combustible substances than others because different substances catch fire at different temperatures. Some substances have a low ignition temperature; therefore, they can catch fire more easily than others.

Explanation:

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