In 1960 a plane flew from a New York airport to Hitro airport, London. It flew in 1960 in the middle of the sky, it disappeared. The world got surprised that how did and where did it go from the sky. The whole media and the journalist also started to make a news about that plane. The PM and all the leaders for the countries meet and decided to send 100 helicopters in each countries and cars to look for it. The world kept searching for it till 20 years past. The PM and the leaders thought to stop searching for it but the New York’s airport concerned that there was a leader from New York, that needed to go for a meeting in London. The world said that until we find the plane we will never stop. After 5 years past but no-one got a clue of the plane. The countries journalist stopped to show the news about it. The world spent 1,00,000,000,000 liters of fuel for helicopters and cars to find it. In 1993 every one stopped looking for it. Some mysterious thing happened and in 1994 everyone got the news that the plane landed in Hitro airport, London after 34 years. When they got the news that did an emergency landing in the middle of the destination and then flew back to the Hitro airport, London. That was the end of that missing plane.
You might have noticed in movies and also in real life that whenever there is a fire inside a building, the glass windows crack and break. The openings of the windows in the walls of the room on fire play a key role in the spread of fire. Windows are those parts of the buildings that generally have less resistance to fire in comparison to that of the walls. During a fire, there is a increase in temperature inside the room. The glass pane is not subjected to uniform heat from the fire. Glass windows are fitted within the frames, and the thickness of the frame is larger in comparison to that of the glass pane. There is an intense heat flow that is suddenly experienced on one side of a glass pane. As a result, the heat focussed on the central region of the glass causes it to expand. While the edges of the pane happen to be relatively cooler, which induces stress in the material. This shifting gradient is known to shatter the glass to pieces.
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