G azərbaycan respublikasi təHSİl naziRLİYİ azərbaycan texniKİ universiteti M. M. QƏNDİLova e. Q. İsmayilova

Key Words and Phrases:
versatile (adj.) tool ( n)

throw (v) shake (v)

break (v) weld (v)

invent (v) boil (v)

grind (v) thickness (n)

solids (n) combine (v)

touch (v) frequency (n)

wire (n) precede (v)

substance (n) collide (v)

machining withstand (v)

penetration (n) spot (n)

I. Answer the following questions:

1. 
   What is the versatile and powerful tool that electronics has given to modern industry?
   
2. 
   What are some of the processes that ultrasonic can perform?
   
3. 
   When was the first tool for ultrasonic experiments invented? What was it?
   
4. 
   What animals can hear sounds beyond human hearing?
   
5. 
   Why does sound travel faster through solids than liquids and faster through liquids than gasses?
   
6. 
   What are the advantages of ultrasonic over other methods in cleaning (machining, medicine)?
   
7. 
   What can solvents do in cleaning?
   
8. 
   How accuracy can be reached by means of ultra-sonic?
   
9. 
   Is the distance between molecules of solids and air different or same?
   
10. 
    What can be machined by ultra-sonic equipment?