thermodynamics

...velocity...? What is the net force on a car cruising at constant velocity of 70km/hr (a) on a level road and (b) going up a hill?

...EMERGENCY 20 POINTS TO THE ANS dude? Refrigerant-134a at 250 kPa and 20°C undergoes an isothermal reversible process in a closed system until its quality is 25 percent. a)Determine the specific entropy of the refrigerant in the initial state. b)Determine the specific internal energy of the...