The tensile stress (σ) induced in a thin flywheel rim due to the centrifugal force acting on it is given by which formula (where ρ is density and v is linear velocity)?

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?