Anew cement mixing truck can be purchased for $100,000 and will have a salvage value of $50,000 at the end of 5 years. the cost of concrete mix for the truck is $100 per cubic yard. alternatively, the construction company can pay $105 per cubic yard to have concrete delivered by a third party. assume the construction company can order the concrete mix or delivery for the whole year on their account, and pay the full balance at the end of each year. at an interest rate of 10% per year, the minimum cubic yards of concrete that must be used each year to justify the purchase of a truck is closest to:

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.