What purpose do batter boards serve? a. they hold sting lines that serve as reference marks for foundations b. they carpenters cut hip rafters in complex roof framing c. they brace foundation walls against cave-ins d. they prevent the collapse of heavy timber beams or trusses in the event of fire

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.

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.