Here you have some questions about the Second Industrial Revolution inventions:
Who were the inventors of the following crucial inventions: first electric battery, first electric motor, telegraph, incandescent light bulb, four-stroke engine, radio?
What was the first electrical telegraph line? When did it start working?
What was Menlo Park? Who was the "Wizard of Menlo Park" and why was he called this way?
What was the so called "War of currents"? Who were its main protagonists? What lethal invention was related to this war?
There are thousands of women inventors, but their achievements remain mainly unknown. Here you have some important women inventors who contributed to make life easier: Margaret Knight, Mary Anderson, Josephine Cochran and Katherine Blodgett. What did they invent?
Some inventions soon became consumer goods and are present almost in every house in the developed countries. Who were the inventors of the sewing machine and the washing machine?
P.S: I´m not including the sources of the pictures until someone answers the questions.