If a 1-inch water pipe enters a basement wall and must be extended to the ceiling, a should be used. a. 1 1/2-inch three-way elbow

b. street or service elbow

c. 3/4-inch 90-degree service elbow, galvanized

d. 1-inch 90-degree elbow, galvanized, malleable iron, screw

Most leaks in reciprocating air compressors can be detected and minimized by: (clo4) a)-detecting leakage areas using ultrasonic acoustic detector. b)-tightening joints and connections c)-replacing faulty equipment d)-all of the given options

What is a monomer? how do they form a ploymer from the view point of chemical bonding?

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.