Product $(A)$ is

Two loops $P$ and $Q$ are made from a uniform wire. The radii of $P$ and $Q$ are $r_1$ and $r_2$ respectively,and their moments of inertia are $I_1$ and $I_2$ respectively. If $\frac{I_2}{I_1} = 4$,then $\frac{r_2}{r_1}$ equals:

Who is the scientist known for classifying the plant kingdom into two main groups?

The cosine of the angle $A$ of the triangle with vertices $A(1, -1, 2)$, $B(6, 11, 2)$, and $C(1, 2, 6)$ is:

The best-defined function of Manganese in green plants is:

The equations of the normals at the ends of the latus rectum of the parabola $y^2 = 4ax$ are given by