As more slits with the same spacing are added to a diffraction grating the lines:

A. become narrower

B. do not change in position or width

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In the equivalent rectangular concrete stress distribution, the distance from the fiber of maximum strain to the neutral axis shall be measured in a direction parallel to the neutral axis A. True. b. False.

When designing solid rockets, thrust and mass flow must be considered time dependent. a) True b) False

The theoretical maximum specific gravity of a mix at 5.0% binder content is 2.495. Using a binder specific gravity of 1.0, find the theoretical maximum specific gravity at 6.5% binder content.

HPD cord shall be permitted for a. hard usage b. not hard usage C. extra-hard usage d. all of these What's the answer

The Reynolds number, rhoVD/μ is a very important parameter in fluid mechanics. Determine its value for ethyl alcohol flowing at a velocity of 4 m/s through a 2-in.-diameter pipe.

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