Look at the two wave diagrams. which best describes the difference between wave a and wave b? wave a density of air m . wave a has a greater intensity and transfers more energy wave b has a greater intensity and transfers more energy wave a transfers more energy, but wave b has a greater intensity. wave b transfers more energy, but wave a has a greater intensity time wave b density of air mark this and return save and exit next submit

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