An airplane is ying in the direction 25 west of north at 800 km/h. (a) (4 points) Find the component form of the velocity of the airplane, assuming that the positive x-axis represents due east and the positive y-axis represents the north. (b) (8 points) What speed and direction should the wind be in order for the airplane to now y 500 km/h due east

Figure shows a simple cathode-ray tube. a beam of particles, emitted by the cathode, strikes the centre of the screen.a. why the cathode must be heated? b. what is the principal energy change that occurs when the beam strikes the screen? c describe and explain what you would expect if the two deflecting plates g and h were connected to an alternating voltage supply