$(7)$

Chapter $9$ Problem $58$ modified. A thin, rigid, uniform rod has a mass of $2\mathrm{.}00$ kg and a length of $2\mathrm{.}00$ m and rotates at an angular speed of $24\mathrm{.}0ra\frac{d}{s}$ relative to an axis that is perpendicular to the rod at one end. Find the rotational kinetic energy of the rod.

$(7)$ Chapter $11$ Problem $24.$ A mercury barometer reads $753\mathrm{.}0$ mm on the roof of a building and $760\mathrm{.}0$ mm on the ground. Assuming a constant value of $1\mathrm{.}29k\frac{g}{m^3}$ for the density of air, determine the height of the building in meters. $g=9\mathrm{.}80\frac{m}{s^2}1\mathrm{.}0$ mm mercury $=133\mathrm{.}3Pa$