Three identical vessels are filled with three liquids $A, B$, and $C$ with equal masses but having densities $\rho_A, \rho_B$, and $\rho_C$ respectively. If $\rho_A > \rho_B > \rho_C$, then the pressure at the bottom of the vessels will be:

Define thrust and pressure and give their unit and dimensional formula.

What is thrust?

Explain the specific density or relative density of a substance.

The Sun is a hot plasma (ionized matter) with its inner core at a temperature exceeding $10^{7} \; K$,and its outer surface at a temperature of about $6000 \; K$. At these high temperatures,no substance remains in a solid or liquid phase. In what range do you expect the mass density of the Sun to be,in the range of densities of solids and liquids or gases? Check if your guess is correct from the following data: mass of the Sun $= 2.0 \times 10^{30} \; kg$,radius of the Sun $= 7.0 \times 10^{8} \; m$.

Define density. Write its unit and dimensional formula.