यदि मूलभूत आवृत्ति (fundamental frequency) 20 Hz है, तो 7वें हारमोनिक (7th harmonic) की आवृत्ति ज्ञात कीजिए।

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?