Which of the following best describes the role of engineers

Problem 4: Air flows into an open system and carries energy at the rate of 100 kW. When the air leaves the system, the energy rate it carries is 250 KW. In the meantime, the system receives 350 kW power and negligible heat flux.

Which of the following is a potential hazard to your head? Choose up to three questions a. Electrical shock b. High noise levels c. Falling objects d. Low hanging beams

Introduction to gear and gear ratios: If you have two gears of the same size does the output speed increase, decrease, or remain the same constant?

Answer True of False to the following statements. a. Above its glass transition temperature, a polymer is glassy and brittle. b.

A 6x50 mm flat alloy bar clongates 1.22 mm in a length of 1.5 m under a total axial load of 35.0 NThe proportional limit of this alloy is 300 MPa Determine: '.50" 35 kN 35 kN 6 x 50 A. The axial stress in the bar. B.

Work done by a system during a process can be considered as a property of the system. a) True b) False

When the compression process is non-quasi-equilibrium, the molecules before the piston face cannot escape fast enough, forming a high-pressure region in front of the piston. It takes more work to move the piston against this high-pressure region.

hypothetical A-B alloy of composition 40 wt% B-60 wt% A at some temperature is found to consist of mass fractions of 0.66 and 0.34 for the α and β phases, respectively.

10. Which of these requires a wheel alignment after replacement? A. Struts B. Shocks C. Both

What is the definition of diameter pitch?