Atorpedo 600 mm diameter and length of 5 m moves in sea water at a speed of 90 km/h. estimate the power required to overcome skin drag if ε = 0.5 mm. state all the assumptions you made.

Abrake has a normal braking torque of 2.8 kip in and heat-dissipating cast-iron surfaces whose mass is 40 lbm. suppose a load is brought to rest in 8.0 s from an initial angular speed of 1600 rev/min using the normal braking torque; estimate the temperature rise of the heat dissipating surfaces.

Different types of steels contain different elements that alter the characteristics of the steel. for each of the following elements, explain what the element does when alloyed with steel.

Inspection for bearing condition will include: (clo4) a)-color b)-smell c)-size d)-none of the above