The Way Science Works 105-1 mid-term Exam


( 20 points each )


1. Why ultra-high voltage is used when sending electricity from power plant to cities ?


2. What is the strength and weakness of cement (concrete) as a material for buldings?


3. What Alum (Aluminium Sulfate) has to do with our city life ?


4. It is said "No metals in Microwave", but microwave ovens are made of metal, isn't that contrdictory ?


5. Why Inerter (variable-frequency) air conditioner save energy ?