Agrasshopper makes four jumps. the displacement vectors are (1) 38.0 cm, due west; (2) 27.0 cm, 42.0° south of west; (3) 20.0 cm, 66.0° south of east; and (4) 23.0 cm, 77.0° north of east. find (a) the magnitude and (b) direction of the resultant displacement. express the direction as a positive angle with respect to due west.

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.

4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?