A60-lb aluminum bar, initially at ta = 190of, is placed in a tank together with 190 lb of liquid water, initially at tw = 70of, and allowed to achieve thermal equilibrium. the aluminum bar and water can be modeled as incompressible with specific heats ca = 0.216 btu/lb·or and cw = 0.998 btu/lb·or, respectively. consider the aluminum bar and water as the system and ignore heat transfer between the system and its surroundings.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

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.

Vibration monitoring this technique uses the noise or vibration created by mechanical equipment and in seme cases by plant systems to detemine their actual condtion. a)- true b)- false