Elbow joint is an example of

If $(2,-1,3)$ is the foot of the perpendicular drawn from the origin to the plane,then the equation of the plane is

The area bounded by the curves $y = x(x - 3)^2$ and $y = x$ is (in sq. units) :

The speed of sound in oxygen $(O_2)$ at a certain temperature is $460 \; m/s$. The speed of sound in helium $(He)$ at the same temperature will be (assume both gases to be ideal): (in $; m/s$)

Hydrolysis of sucrose with dilute aqueous sulphuric acid yields

In which of the following compounds does nitrogen exhibit the highest oxidation state?