You are in a hot air balloon, 350 m above the flat texas plains. you look out toward the horizon. how far out can you see--that is, how far is your horizon? the earth's radius is about 6400 km.

An experiment was performed on a 2-kg block. forces of 5, 10 and 15 newtons respectively were applied to the block for 5 seconds. describe the difference in acceleration between the three trials. a) the final accelerations will all be the same. b) the final acceleration will triple between the first and third trial. c) the final acceleration will be cut by 1/3 from the first to third trial. d) the final acceleration will increase nine time between the first and third trial.