A concrete column has a diameter of 350 mm and a length of 2 m. If the density (mass>volume) of concrete is 2.45 Mg>m3, determine the weight of the column in pounds.

ME 3350 Notes – Week 6 7 – Energy Equation Stored Energy: Associated with given mass (kinetic→motion, potential→position, internal) Energy in transition: Moving between systems (heat→temperature difference, work→external forces) Consider a system: Work done by fluid on surroundings, heat to system from surroundings dE ∆ E=E −2 =Q1W =Q−W ´ RTT: dt δ ρedV + ρev∙dA=Q−W ´ ´ δt CV CS Physical Interpretation: Time rate of change (RoC) of stored energy in CV @ t + Net efflux of stored energy through CS @ t = Rate of heat addition to fluid in CV @ t – Rate of work done by fluid in CV @ t, 1 2