The highest frequency of a piano is about 4200 Hz. What is the wavelength of the sound wave in air, if the speed of a sound wave in air is 340 m/s?

Answerwavelength;

Attach the free body diagram and i will you answer the question.! : d

Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.