Two technicians are discussing the purpose of a transfer case in a four-wheel-drive system. technician a says it transfers power to an additional axle. technician b says some transfer cases have two speeds. which technician is correct?

select one:
a. technician a only
b. technician b only
c. both technicians a and b
d. neither technician a nor b

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.