Problem Statement

Mineralogists rely on one particular hardness test to help tell minerals apart - which method is it? Brinell Hardness test Vickers hardness test Scratch hardness test Rockwell hardness test A U-shaped manometer, partly filled with water, is hooked up to a gas line. The two arms differ in height by 30 cm, and the gauge reads a gas pressure of 10 kPa. Using g = 9.81 m/s² and a water density of 998 kg/m³, find the absolute pressure of the gas supply. 12.937 kPa 120.8 kPa 13.5 kPa 10.5 kPa A 4-meter-tall tank holds a fluid with density 1000 kg/m³. Once a hole opens at the bottom and fluid begins draining out, what speed does the fluid reach at that bottom opening? 7.67 m/s 8.86 m/s 11.18 m/s 14.14 m/s A shaft measuring 25 mm across experiences a torsional shear stress of 80 MPa. What's the largest torque it can take before failing? 24.55 N-m 245.436 N-mm 245.436 N-m 24.55 N-mm In a gear train, a 20-tooth gear meshes with a 50-tooth gear. Given the smaller one spins at 1000 rpm, how fast do