For two mating wheels of equal size with a 20° pressure angle and an addendum equal to one module, the minimum number of teeth on each wheel to avoid interference must be:

Which movement aimed to promote Khadi, a hand-spun and handwoven cloth native to India?

Who were prominent leaders associated with the initial phase of the Telangana Rebellion (1946-1951) against the Nizam's rule and feudal landlords?

What was the immediate trigger for the Revolt of 1857?