In 1657 a plane flew from a airport, the pilot followed the instructions to fly because that plane had special people in it. The plane flew safely. In the middle of the way the plane started to move up and down but the pilot handled it. When the plane started the process to land, the plane came closer to the land. The back wheel didn’t open so the pilot talked to the air control. The pilot thought to land on the front wheel but the air control said NO. The pilot thought to fly the plane in the sky. The plane went up and when it was rotating it was shaking. The plane came back to land but again the wheel’s didn’t open. The pilot took the plane in the sky the 2nd time. When it was rotating again It was shaking but again the wheel’s didn’t open. The pilot took the plane in the sky the third time. When it was rotating it was again shaking but in the third time the wheel’s opened. It safely landed on the ground. That was the end of the Back Wheel.
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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