If the radius of the earth decreases and its mass remains the same, then the value of "acceleration due to gravity" will _____ .
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If the angle of incidence formed on a concave mirror at a point is 30 deg then the angle of reflection will be
The number of neutrons in an atom is equal to the :
World Wide Web was invented by ________.
The Mongols under ___________ invaded Transoxiana in north-east Iran in 1219.
In India, which city is also known as 'City of Palaces'?
Which of the following river originates in Nepal and flows into the Ganges?
............. elements have the largest atoms