This English question involves literary analysis, grammar, or writing skills. The detailed response below provides a well-structured answer with supporting evidence and clear explanations.
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here are the concise answers for the 4th and 5th questions: 4. Electric toaster and iron coils are made of alloys because alloys have higher resistivity (producing more heat), higher melting points (preventing melting at high temperatures), and do not oxidize readily at high temperatures, ensuring durability and efficiency. 5. a) Between iron and mercury, iron is a better conductor due to its significantly lower resistivity. b) Between silver and copper, silver is generally considered the best electrical conductor.