World Geography
Which of the following is measured on the Richter scale?

Velocity of tornadoes
Height of mountains
Intensity of earthquakes
Density of liquids

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World Geography
The sidereal month may be defined as

the period in which the moon completes an orbit around the earth
the period of rotation of moon
the period in which the moon completes an orbit around the Earth and returns to the same position in the sky
None of these

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World Geography
Which among the following period in the demographic history of India is called the Period of Stable Population?

1891 to 1921
1921 to 1951
1981 to Present
1951 to 1981

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