The abundance of a species population within its habitat is called

What is the output $Y$ in the following circuit,when all the three inputs $A, B, C$ are first $0$ then $1$?

$A$ vessel contains a mixture of one mole of oxygen and two moles of nitrogen at $300 \ K$. The ratio of the average rotational kinetic energy per $O_2$ molecule to that per $N_2$ molecule is

The correct stability order for $N_2$ and its given ions is

Let $n = 1! + 4! + 7! + \ldots + 400!$. Then the ten's digit of $n$ is

The distance between the foci of the hyperbola $x^2 - 3y^2 - 4x - 6y - 11 = 0$ is