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The outer surface of a beaker containing ice cubes becomes wet in short while - Give scientific reason.

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Question  The outer surface of a beaker containing ice cubes becomes wet in short while. Answer  When ice cubes are placed in a beaker, ice starts melting.  The heat required for melting is absorbed from the surrounding air and also from the beaker to some extent.  Hence, the temperature of the air and beaker falls.  The capacity of air to hold water vapour depends upon the temperature of the air, and this capacity decreases as the temperature decreases.  At a certain low temperature, the surrounding air becomes saturated with water vapour present in it.  As the temperature falls further, the air is unable to hold all the water vapour.  Hence, the extra water vapour starts condensing on the cold outer surface of the beaker in the form of minute drops.  Therefore, The outer surface of the beaker containing ice cubes becomes wet in a short while.
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Emergency actions and Circulation of disaster

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Emergency actions in disaster 

In emergency condition various transportation methods like cradle method, carrying on back carrying on two hands are to be followed. Those methods depend upon the condition of a victim.
We face different types of major or minor disaster in your daily life victims of disaster need to be offered some primary help before actual medical treatment. first aid is useful in such circumstances.

 Circulation of disaster 

            If the victim is unconscious then after giving mouth to mouth respiration twice, the heart should by pressed down hard by pressing the chest with both the palms.
These two actions should be repeated alternately about 15 times this is called cardiopulmonary rescuitation (CPR). it helps to bring the circulation back to normal.
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