Which one of the following conditions is incorrect for a well-behaved wave function $(\psi)$?

Two blocks of masses $1 ~kg$ and $2 ~kg$ are connected by a metal wire going over a smooth pulley as shown in the figure. The breaking stress of the metal is $2 \times 10^9 ~N/m^2$. What should be the minimum radius of the wire used if it is not to break? Take $g = 10 ~m/s^2$.

Which of the following statements is correct?

The angle between the tangents drawn from the point $(1,4)$ to the parabola $y^2=4x$ is

$A$ large open tank has two holes in the wall. One is a square hole of side $L$ at a depth $y$ from the top and the other is a circular hole of radius $R$ at a depth $4y$ from the top. When the tank is completely filled with water,the quantities of water flowing out per second from both the holes are the same. Then $R$ is equal to

Which one of the following orders is correct for the bond dissociation energies of halogen molecules?