A rocket in outer space is traveling toward a far-off planet. An astronaut turns on the rocket’s engines, which exerts a force on the rocket. There is no gravity or air resistance. While the engines are on, how will the rocket move?

Students in an introductory physics lab are performing an experiment with a parallel-plate capacitor made of two circular aluminum plates, each 11 cm in diameter, separated by 1.0 cm. how much charge can be added to each of the plates before a spark jumps between the two plates? for such flat electrodes, assume that value of 3×106n/c of the field causes a spark.