What is the speed of a wave frequency of 300hz and a wavelength of 25M I NEED AN EXPLANATION AS WELL
PLEAAASE HELP ASAP

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Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Which of the following list the divisions of the geologic time scale in order from longest to shortest