Materials in Electrical Engineering - "Did you know?"

29-Track 29.mp3 You are going to hear part of a radio quiz "Did you know?". You will be quizzed on 9 questions. Listen and answer question 1. 1 In honour of which countries are francium, ruthenium and americium named? France, Romania, America France, Russia, America Germany, Russia, America 30-Track 30.mp3 Listen and answer question 2. 2 Which basic ingredient is used in glass and bricks? 31-Track 31.mp3 Listen and answer question 3. 3 Which material do a type of fuel and a precious stone have in common? 32-Track 32.mp3 Listen and answer question 4. 4 Where was porcelain first made in the Western World? Italy China Germany 33-Track 33.mp3 Listen and answer question 5. 5 Why did rubber become a very useful material after 1830? Also, explain what happened and name the person who made rubber a useful material. 34-Track 34.mp3 Listen and answer question 6. Which metal was legal tender (zakonsko sredstvo plaćanja) until 1893 in the US? gold silver brass 35-Track 35.mp3 Listen and answer question 7. 7 Which seven metals were known to the ancients? 36-Track 36.mp3 Listen and answer question 8. 8 What do you call the property that certain substances have at low temperatures allowing electricity to flow with no resistance? supraconductivity superconductivity 37-Track 37.mp3 Listen and answer question 9. 9 Which element of the carbon family makes up almost 30 % of the earth's crust and has a valley in California named after it? Use a dictionary if you are not sure how to spell the word in the recording. silicium silicone silicon