Propagation of sound can be visualised as propagation of ____________ variations in the medium
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Which instrument is used for measuring humidity of atmosphere?
The longest river of peninsular India is__________
Which geographical division of India is the oldest?
The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called _____.
Which Indian organisation is developing ‘Green propulsion’ technology, that was seen in the news recently?
What is called the minimum distance from the Sun in a planet in its orbit?
Haematite is an ore/mineral of