Jessa examines a bullet at a crime scene. The markings, called might link the bullet to a specific weapon. She also finds some fingerprints smeared in the blood of the victim. These are fingerprints.

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

The maximum shear stress and maximum flexural stress occur at the same location along a beam subjected to a non-uniform bending load. a)-trune b)- false

Afan that can provide air speeds up to 60 m/s is to be used in a low-speed wind tunnel with atmospheric air at 35 c. if one wishes to use the wind tunnel to study flat-plate boundary layer behavior up to reynolds numbes of re 10, what is the minimum plate length that should be used? at what distance from the leading edge would transition occur if the critical reynolds nurnber were rer,e = 5 × 105?