Answer:
835.2267 Hz
Explanation:
M = Molar mass
= Specific heat ratio
L = Length of tube
For open ends the frequency is
![f=\dfrac{v}{2L}](https://tex.z-dn.net/?f=f%3D%5Cdfrac%7Bv%7D%7B2L%7D)
For closed ends the frequency is
![f=\dfrac{v}{4L}](https://tex.z-dn.net/?f=f%3D%5Cdfrac%7Bv%7D%7B4L%7D)
So, ![f\propto v](https://tex.z-dn.net/?f=f%5Cpropto%20v)
Speed of sound is given by
![v=\sqrt{\dfrac{\gamma RT}{M}}\](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%5Cdfrac%7B%5Cgamma%20RT%7D%7BM%7D%7D%5C)
So, ![v\propto \sqrt{\dfrac{\gamma}{M}}](https://tex.z-dn.net/?f=v%5Cpropto%20%5Csqrt%7B%5Cdfrac%7B%5Cgamma%7D%7BM%7D%7D)
From the above relations we get
![\dfrac{f_h}{f_a}=\sqrt{\dfrac{\gamma_hM_a}{\gamma_aM_h}}\\\Rightarrow \dfrac{f_h}{f_a}=\sqrt{\dfrac{1.67\times 28.8}{1.4\times 4}}\\\Rightarrow \dfrac{f_h}{f_a}=2.93062](https://tex.z-dn.net/?f=%5Cdfrac%7Bf_h%7D%7Bf_a%7D%3D%5Csqrt%7B%5Cdfrac%7B%5Cgamma_hM_a%7D%7B%5Cgamma_aM_h%7D%7D%5C%5C%5CRightarrow%20%5Cdfrac%7Bf_h%7D%7Bf_a%7D%3D%5Csqrt%7B%5Cdfrac%7B1.67%5Ctimes%2028.8%7D%7B1.4%5Ctimes%204%7D%7D%5C%5C%5CRightarrow%20%5Cdfrac%7Bf_h%7D%7Bf_a%7D%3D2.93062)
![f_h=f_a2.93062\\\Rightarrow f_h=285\times 2.93062\\\Rightarrow f_h=835.2267\ Hz](https://tex.z-dn.net/?f=f_h%3Df_a2.93062%5C%5C%5CRightarrow%20f_h%3D285%5Ctimes%202.93062%5C%5C%5CRightarrow%20f_h%3D835.2267%5C%20Hz)
The frequency of helium is 835.2267 Hz
It does not matter if the tube is closed or open as ![f\propto v](https://tex.z-dn.net/?f=f%5Cpropto%20v)
Answer:
magnesium (Mg), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table, and the lightest structural metal. Its compounds are widely used in construction and medicine, and magnesium is one of the elements essential to all cellular life.
Explanation:
hope it helps
Galaxies are comprised of groups of stars circling a common gravitational point (which is theorized in the Milky Ways case to be a black hole). The answer is True.
The units of his measurement is newtons.