1. What is the name of the process in which heating or cooling of a gas results from a change in pressure. 
2. Measured in amperes, what name is given to a flow of electrons in an electrical conductor
3. Beginning with the letter "S" what name is given to a mathematical function which describes a smooth repetitive oscillation 
4. In engine terminology what does DOHC stand for
5. What is the name of a person who creates metal objects by hand typically forging the metal with tools
6. What is the chemical element with the symbol Sn.  It is the 49th most abundant element and is mainly obtained from the mineral cassiterite where it occurs as a dioxide
7. Which company has announced plans to release a LED lightbulb which can last 17 years
8. From the Greek for globe or ball, what name is given to a perfectly round geometrical  object in three-dimensional space
9. Which company builds the Black Hawk helicopter
10. What is the name of the Google mobile operating system which uses a modified version of the Linux kernel
    
    
    Bonus Question
    What am I
    I am an iron alloy
    I have a very low carbon content compared to steel
    I have fibrous inclusions known as slag
    I have a grain which resembles wood
    I am tough, malleable ductile and easily welded
    I have been in use for many centuries dating back to Roman times
    Before the development of current steelmaking methods I was the most common iron being used
    I was produced by a variety of smelting methods generically referred to as bloomeries
    Typically I was used for rivets, nails, chains, nuts, bolts, horse shoes and ornamental ironwork
    
     Hold down the left mouse button and drag below - to reveal the answer

    1) Adiabatic  2) Current  3) Sine Wave or Sinusoid  4) Double Over Head Cam  5) Blacksmith  6) Tin  7) General Electric (GE)  8) Sphere  9) Sikorsky Aircraft Corp.  10) Android
 What am I - I am Wrought Iron