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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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Types of Disaster

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 Disaster

Types of Disaster

a) Natural Disaster

b) Man-Made Disaster.


a) Natural Disaster: 

Disaster are "all of a sudden" troubles to the mankind such events cause sudden change in the environment and thereby cause the damage to it some of the main disasters are floods, wet and dry famine cyclones earthquakes, volcanoes etc.

b) Man-Made Disaster:

Environment is also damaged due to use of natural resources for our development. This leads to sudden disasters, unexpected to human these can be called as man-made disasters. for examples-deforestation, unplanned urbanization, poisonous gases spill, Atomic test, Accident.

Definition of disaster by United Nations:

United nations has defined the disaster as "the sudden event the leads to the huge loss of life and property.
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