वह बिंदु जिसके परितः कोई तैरता हुआ पिंड झुकाए जाने पर दोलन करना शुरू कर देता है, क्या कहलाता है?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?