What is energy? a. the number of atoms in an object
b. a form of sound
c. the ability to do work
d. the size of an object

(ik its not b or d, but i dont know)

Apiano tuner uses a tuner to create a tone of 5.00 x 10² hz. when a key on the piano is struck he hears 5 beats per second. what is a possible frequency of vibration for the piano string? 2500 hz 1300 hz 605 hz 495 hz

The slope of a velocity time graph over any interval of time gives the during that interval

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?