Which of these discoveries contradict components of dalton’s atomic theory? check all of the boxes that apply. atoms contain smaller particles: protons, neutrons, and electrons. atoms of a given element can bond to other atoms only in specific ways. atoms of a given element can have different numbers of neutrons. nuclear reactions can change an atom of one element into an atom of another element. all atoms of a given element have the same number of protons.

In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm