Two sound waves of slightly different frequencies propagating in the same direction produce beats due to

White vitriol is

'Himgiri' developed by hybridization and selection for disease resistance against rust pathogens is a variety of

If a line $l$ passes through $(k, 2k), (3k, 3k)$ and $(3, 1)$ where $k \neq 0$,then the distance from the origin to the line $l$ is

The compound,found in nature in gas phase but ionic in solid state is

$A$ particle of mass $0.1 \,kg$ is subjected to a force which varies with distance as shown. If it starts its journey from rest at $x=0$,then its velocity at $x=12 \,m$ is .............. $m/s$.