What is $Strigula$?

The height to which a cylindrical vessel must be filled with a homogeneous liquid,so that the average force with which the liquid presses the side of the vessel is equal to the force exerted by the liquid on the bottom of the vessel,is equal to:

In which stage does the condensation of chromosomes reach its maximum level?

The points in the set $\{z \in \mathbb{C} : \arg \left(\frac{z-2}{z-6i}\right) = \frac{\pi}{2}\}$ (where $\mathbb{C}$ denotes the set of all complex numbers) lie on the curve which is a

Modern farmers have been able to increase rice production by $50\%$ using which of the following?

Let the relation $R$ be defined on the set of natural numbers $N$ by $a R b$ if $3 a + 2 b = 27$. Then $R$ is: