Using the definitions of pressure and density, derive the equation $p = \rho g h$, where $p$ represents the pressure exerted by the liquid on the container base and $g$ is the acceleration of free fall.
A small solid sphere falls through the liquid at constant velocity. State the names of the three forces acting on the sphere.
State a word equation linking the magnitudes of these forces.
State and explain the energy changes that happen as the sphere falls.
The liquid in the container is liquid L. Liquid M is then added to the container. The two liquids do not mix. The combined depth of the liquids is $0.17\,\text{m}$. Fig. 2.2 shows how the pressure $p$ inside the liquids varies with height $x$ above the base of the container. Use Fig. 2.2 to state the value of atmospheric pressure.
Use Fig. 2.2 to find the density of liquid M.
State and explain the energy changes that happen as the sphere falls.
The liquid in the container is liquid L. Liquid M is then added to the container. The two liquids do not mix. The combined depth of the liquids is $0.17\,\text{m}$. Fig. $2.2$ shows how the pressure $p$ inside the liquids varies with height $x$ above the base of the container.