You just bought a brand new lawn tractor. It has a 2 cylinder gasoline engine, meaning it has 2 pistons. Each piston has a surface area of 9 square inches, and the amount of room the piston can travel (length) in each cylinder is 2 inches. 1. What is the displaced Volume of the whole Engine?

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.