When a $p-n$ diode is reverse biased,then

Both the blocks shown in the figure have mass $m$ and are moving with constant velocity in the directions shown. They are in a resistive medium which exerts an equal constant force $F$ on both blocks in the direction opposite to their velocity. The tension in the string connecting them is (Neglect friction):

In polymeric $(BeCl_2)_n$,there are

If mass-energy equivalence is taken into account,when water is cooled to form ice,the mass of water should

$\int_0^3 \frac{3x+1}{x^2+9} dx$ is equal to :

Which one of the following is a correct pair with respect to the molecular formula of a xenon compound and the hybridization state of xenon in it?