51.When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in

52.If a bar magnet is broken into two pieces, then

53.What is the correct sequence of the decreasing order of velocity of light in the following media ? 1. Glass 2. Diamond 3. Water

54.In a pond, a boat is moving. At one place in the middle, the water begins to enter the boat through a hole. At the point, the boat is ready to sink, the water level will

55.Albert Einstein was a