Why might peck drilling be used instead of standard drilling with a 0.25" diameter hole which is 3 inches deep on a aluminum part? a. to save time b. to reduce temperature and tool wear of the bit c. to keep the flutes fully engaged at all times and increase chip length

The force on a cutting tool are 2600n vertically downward and 2100 horizontal. determine the resultant force acting on the tool and the angle at which it acts.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

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