The escape speed from the Earth is close to 11.2 km/s. On another planet whose radius is half of the Earth's radius and whose mass density is four times that of the Earth, the escape speed in km/s will be close to:

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?