In the leaf,vascular bundles are found in the

The image of the point $(3, 2, 1)$ in the plane $2x - y + 3z = 7$ is

Which two orbitals are located along the axis and not between the axis?

Diffusion current in a $p$-$n$ junction is greater than the drift current in magnitude when:

The point of contact of the circles $x^2+y^2+2x+2y+1=0$ and $x^2+y^2-2x+2y+1=0$ is

Two photons of energy $2.5 \ eV$ and $3.5 \ eV$ fall on a metal surface of work function $1.5 \ eV$. The ratio of the maximum velocities of the photoelectrons emitted from the metal surface is