Which examples are design tradeoffs? Choose all that apply. a. the design of lightweight plastic materials to build car bodies to reduce weight and fuel use, instead of using stronger, heavier steel, which is more durable, but will increase fuel use
b. the design of larger wheels on mountain bikes to cycle more smoothly over rocky surfaces, instead of smaller wheels that manage tight turns easier, but cause a bumpier ride
c. the use of a paper grocery bag to carry groceries home
d. the use of lower quality, low-resolution images in a phone texting program in order to be able to send the images more quickly to a recipient

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.