1. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

2. Who invented Piano ?

Answer:

Bartolomeo Cristofori

3. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

4. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

5. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

6. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

7. Who invented Nylon ?

Answer:

Wallace Carothers