An airplane is heading north at an airspeed of 600 km/hr, but there is a wind blowing from the southwest at 40 km/hr. Find the number of degrees the plane is off course and its groundspeed.

Which quantities are scalars? choose all that apply a. distance b. speed c. acceleration d. velocity

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?