Wood is not a pure substance it is a mixture, because it is composed of compounds such as cellulose, hemicelluloses, and lignin which are made up of elements such as carbon, hydrogen, and oxygen.
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An iambic pentameter is a metric line where one stressed syllable is followed by one unstressed syllable. (the pattern is something like this:Λ_Λ_Λ_ where Λ stands for the stressed syllable)
Shakespeare is an author who used it extensively in his poetry and it is believed that he actually established the use of iambic pentameter . He chooses to write in it because it copies the sounds of natural human speech, even the rhythm of a human heartbeat.
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