2) On a summer day, when the temperature outside is 30.0 °C, I hear a 7.50 x 10^2 Hz bell from the
clock tower at URI, which I know is 2300. m away from my house.

a) Calculate the speed of sound in air on this day.

b) Calculate the wavelength of the sound.

c) Calculate how long, before I heard the sound, it had been emitted from the clock tower.

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