पृथ्वी की भूपर्पटी में गहराई के साथ तापमान में वृद्धि की औसत दर, जिसे भू-तापीय प्रवणता (geothermal gradient) भी कहा जाता है, लगभग कितनी होती है?

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?