Circular fins of uniform cross section, with diameter of 10 mm and length of 50 mm, are attached to a wall with surface tem perature of 350°c. the fins are made of material with thermal conductivity of 240 w/m k, and they are exposed to an ambient air condition of 25°c and the convection heat transfer coefficient is 250 w/m2-k. determine the temperature at the middle of the fin for infinitely long fin.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

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.

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.