The grid in a triode is kept negatively charged to prevent… a. the variations in voltage from getting too large. b. electrons being repelled back to the cathode. c. electrons from escaping from the tube containing the triode. d. the electrons from being attracted to the grid instead of the anode.

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.