A sound wave in air has a frequency of 405 Hz, Part A What is its wavelength? Ta

Question

A sound wave in air has a frequency of 405 Hz, Part A What is its wavelength? Take the speed of sound in the air to be 343 m/s Express your answer using three significant figures mi Submit Request Answer Part B If the frequency of the sound is increased, does its wavelength increase, decrease, or stay the same? increases decreases stays the same Previous Answers Correct Part C Explain. When frequency increases, wavelength decreases because the speed remains the same in a medium and wavelength i speed/frequency ous Answe Submitted, grade pending

Explanation / Answer

A) 0.847 metre

speed =wavelength*frequency

Wavelength=343/405=0.8469135

For 3 significant digits as leading zeros are not significant and digit after third significant no is greater than 5 so third digit is incrrased by 1

Wavelength=0.847 metre

B) it decreases

C) you have explained clearly

D) 0.714 metre

Wavelength=343/480=0.71458333

As preceeding digit before 5 is 4 and it is an even digit so 4 remains unchanged (if it is odd, then increase its value by 1)

Wavelength=0.714 metre

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