जब पुली या हब जैसे घटक को घूमते समय शाफ्ट पर एक निश्चित दूरी तक अक्षीय रूप से (axially) सरकना होता है, तब किस प्रकार की कुंजी (key) उपयोगी होती 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?