किसी अनुदैर्ध्य तरंग (longitudinal wave) में दो लगातार संपीडनों (compressions) या दो लगातार विरलनों (rarefactions) के बीच की दूरी को क्या कहा जाता 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?