The average age of 4 children in a family is 30% of the average age of the mother and the youngest child. The total age of the father and the eldest child is 42 years. If the father’s age is 28 years, what is the age of second child?
Since the total or average age of all the family members are not given, the given data is inadequate. So, the age of second child cannot be determined.
When a forward bias is applied to a p-n junction, it
In order to investigate the internal atomic structure of crystals, we make use of:
A spherical ball made of steel when dropped in mercury container will –
The wavelength produced by a He-Ne laser corresponds to the transition in:
Pycnometer is an instrument used to measure the –
The process involved in making soap is
Tungsten is used for the manufacture of the filament of an electric bulb, because –
Which of the following phenomena establishes the transverse nature of light waves?
One kilogram of ice at 0° C is mixed with one kilogram of water at 85° C. The final temperature of the mixture is
(Tale specific heat of ...