Data Entry - Physics

$A$ spherically symmetric gravitational system of particles has a mass density $\rho = \begin{cases} \rho_0 & \text{for } r \leq R \\ 0 & \text{for } r > R \end{cases}$ where $\rho_0$ is a constant. $A$ test mass can undergo circular motion under the influence of the gravitational field of particles. Its speed $V$ as a function of distance $r$ $(0 < r < \infty)$ from the centre of the system is represented by:

Select the correct increasing order of boiling points of alcohols,amines,and carboxylic acids of comparable molar mass from the following.

The compound,found in nature in gas phase but ionic in solid state is

The length of the latus rectum of the parabola $y^2+8x-2y+17=0$ is

Despite being multicellular,its cells are not organized into tissues.