Misc: What year did Emily Pankhurst chain herself to 10 Downing Street?

Questions

What make was the first completely waterproof watch in 1926?

Who was elected US president four times?

What kind of high intensity light beam was proposed by Einstein in 1917?

Which continent was explored by frenchman Jacques Cartier in the 1530s?

Which hungarian composer was said to be the greatest pianist of the 19th century?