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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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The necessary material in first aid box

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The necessary material in first aid box

1) Bandage strips of different size

2) Wound gauze 

3) Triangular and circular bandage 

4) Medicated cotton 

5) Hand gloves 

6) Clean and dry cloth pieces

7) Soap 

8) Antiseptic (Dettol)

9) Safely pins

10) Blades 

11) Small pins 

12) Needle

13) Band aid 

14) Torch

15) Scissor

16) Thermometer

17) Petroleum jelly.

First-aid and emergency action

First Aid:

            First aid is help given to sick or injured person until full medical treatment is available.
                                    or
            Emergency care of treatment given to all ill or injured person until full medical aid can be obtained.


Objectives of First-aid box

1) Saving lives.

2) Prevent illness or injury form becoming worse.

3) Provide immediate life saving medical care before arrival of further medical help.

4) Reliving the pains.

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Basic Principal of first-aid 

1)Airway:

            If the victims has....

2)Breathing:

                    If breathing has....
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