पानी में लोहे की एक छोटी सुई डूब जाती है, जबकि लोहे से बना विशाल जहाज तैरता रहता है। यह किस सिद्धांत पर आधारित है?

The Dandi March, also known as the Salt Satyagraha, was led by which influential leader?

Which act formally granted independence to India, marking the end of British rule?

Who was the key figure in establishing the Indian National Congress?