A pipe open at both ends has a fundamental frequency f in air. The pipe is dipped vertically in water so that half of its length is submerged. The fundamental frequency of the remaining air column inside the pipe now becomes:

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?