Steam engines

This task is about energy transformation. 

Question 1Change answer

steam-train-PK.jpg
 
a)  Steam engines transfer the energy of boiling water into the energy of movement.
     But steam engines are only about 3% efficient. Explain what this statement means.

Question 1Change answer

b)  If the steam generated is producing 1000 joules of energy each second, and the efficiency of the engine is 3%, how much energy would be changed into the energy of movement?
 joules per second

Question 1Change answer

c)  Name three forms of energy that the other 97% of the energy is transformed into:
1.
2.
3.