Aflutist assembles her flute in a room where the speed of sound is 342 m/s. when she plays the note a, it is in perfect tune with a 440 hz tuning fork. after a few minutes, the air inside her flute has warmed to where the speed of sound is 346 m/s.

-got a: how many beats per second will she hear if she now plays the note a as the tuning fork is sounded? 5.15 beats/s

-now gotta find b:
how far does she need to extend the "tuning joint" of her flute to be in tune with the tuning fork? (answer is d=)

Milliseconds. . . . . .

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.