A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated , it will
A person is sitting in a moving train and is facing the engine. He tosses up a coin and the cion fals behind him. It can be concluded that the train is moving:
Who amongst the following became the only sports person to have been awarded all the three maor sports awards viz.Drona Charya Award, Rajiv Gandhi Khel Ratna Award and Arjuna Award?