According to our convention,when do we focus on the defining features of a living organism?

$A$ weightless thread can bear a tension up to $3.7\,kg-wt$. $A$ stone of mass $500\,g$ is tied to it and revolved in a circular path of radius $4\,m$ in a vertical plane. If $g = 10\,ms^{-2}$,then the maximum angular velocity of the stone will be ......... $rad\,s^{-1}$

$A$ parallel plate capacitor with air as medium between the plates has a capacitance of $10\,\mu F$. The area of the capacitor is divided into two equal halves and filled with two media as shown in the figure having dielectric constants $k_1 = 2$ and $k_2 = 4$. The capacitance of the system will now be.......$\mu F$.

The lines represented by $ax^2 + 2hxy + by^2 = 0$ are perpendicular to each other,if ........

The $IUPAC$ name of $(CH_3)_2CH-CH_2-CH_2Br$ is

The mitral valve is supported by which of the following?