Why is it important to cut all the way through an electrical wire on the first try?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Carbon dioxide gas expands isotherm a turbine from 1 mpa, 500 k at 200 kpa. assuming the ideal gas model and neglecting the kinetic and potential energies, determine the change in entropy, heat transfer and work for each kilogram of co2.

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