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Applications of Charles' Law 1- The Ball and the Atmosphere When you blow a ball in the house on a cold day, and when you take it outside, you will notice that the ball shrinks.2- Hot air balloon Charles's law stands behind the explanation of the hot air balloon phenomenon.In a balloon, the air expands when it is heated.

Applications of Charles' Law
1- The Ball and the Atmosphere When you blow a ball in the house on a cold day, and when you take it outside, you will notice that the ball shrinks. According to Charles' Law, the gas will take up more space when its temperature is higher.
2- Hot air balloon Charles’s law stands behind the explanation of the hot air balloon phenomenon. In a balloon, the air expands when it is heated. Also, hot air takes on a larger volume than the volume of cold air when their masses are equal, and the density of hot air is less than the density of cold air. When the air is sufficiently hot, the weight of the balloon and the hot air in it becomes less than the weight of the surrounding cold air, and the balloon begins to rise. If the air in the balloon is allowed to cool, the volume of gas in it will decrease, the density of the gas will increase, and the balloon will begin to descend until it reaches the ground.