Oxygen and carbon dioxide
There’s 10mm in a cm: 22mm
Dddddddddddddddddddddddddddddddddddddddddddddddddddddd
naturally occurring radioactive elements have been around since the Earth's formation
Answer:

Explanation:
From the question we are told that:
Frequency of 3rd harmonics 
Frequency of 5th harmonics 
Generally the equation for Wavelength at 3rd Harmonics is mathematically given by

Therefore

Generally the equation for Wavelength at 1st Harmonics is mathematically given by

Therefore

Generally the equation for the frequency of the first harmonic is mathematically given by


