. Technician A says that all-wheel drive vehicles are the same as four-wheel drive vehicles. Technician B says that front-wheel drive drivetrains are the most common on cars today. Who is correct? a
Technician A
b
Technician B
c
Both A & B
d
Neither A or B

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.