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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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Objectives of disasters managements

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Objectives of disasters managements: 

1)Disposal of human life suffered by human being during the calamity and release of the people.

2)Supply of essential commodities of the people to reduce the effect of disaster. 

3)The restore the human life in the region by creating reconciliation in disaster. 

4)Rehabitant disaster victims.

5)Considering protective measure in disaster, such disaster will not reach in future and slop take care to reduce their intensity.
Thus disaster management achieving or time to time improving the ability to face the disasters though scientific and careful observations and analysis of data. Disaster management can be divided into two parts.


(1)Pre-disaster management:

This includes the complete preparation and planning to face any type of disaster.

(2)Post-disaster management:

This includes providing all types of necessary help to victims of disaster.

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