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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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Main aspects of disaster management cycle

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Main aspects of disaster management cycle

1)Preparation: 

                    Plan is prepared to minimize the destruction in any disaster if occur. 

2)Redemption:

                     Plan for minimizing the damage to the society and country.

3)Preparedness: 

                      A plan is chalked  out so as to get the quick response from general public and administration.

4)Impact of disaster:

                              Intensity of various aspects of disaster and disaster management are reviewed. 

5) Response:

                 Response to the disaster is to be given immediately after the incidence. The factor is followed by the disaster strike in the cycle.

6) Resurgence:

                     Resurgence is an important link between measure after disaster and national development. This steps is useful for progress. Resurrection is a stage used for progress of nation and rehabilitation.


Types of disaster 

a) Natural Disaster :
b) Man - made Disaster: 
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Characteristics of disasters

1.As the disaster occurs suddenly, it cannot be predicted.

2.Hence, precautions are not possible. 

3.Hiuge losses to the property occur in the area of disaster. 
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