1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

3. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

4. Who invented paper ?

Answer:

Cai Lun

5. Who invented Java Language ?

Answer:

James Gosling

6. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori