Questions

Rafael Nadal defeated Daniil Medvedev in the men's singles title at the 2019 US Open. It was Nadal's 19th Grand Slam singles title, and fourth US Open title.

Virat Kohli surpasses Brian Lara with sixth Test double hundred as captain.

After reaching the milestone, Virat Kohli became the first captain to score six double tons in Test cricket. He has also become the first player to score six double centuries in just a span of 17 months. He also became the second Indian to score back-to-back double centuries, only after Vinod Kambli.

Apart from him, the only other cricketers who have scored back-to-back double Test tons are Wally Hammond, Don Bradman, Kambli, Kumar Sangakkara and Michael Clarke.

Before transferring the fish, the position is the man with the fish and the bucket of water. After transferring the position is : the man without the fish, but the fish inside the water in the bucket. Thus to know whether there is any change in weight, it is enough to consider whether there is any change in weight when the fish in air is transferred into the water. The answer is there is no change as when in water though it loses weight due to upthrust of water on it, the level of water increases and exerts an equal force at the bottom

J. J. Thomson discovered electrons in the year 1897.

Ernest Rutherford discovered protons in 1911.

James Chadwick discovered neutrons.