A 4.0-m long pipe is closed at one end. Find the frequency of the ...

[kamilo84]

A 4.0-m long pipe is closed at one end. Find the frequency of the second harmonic. The speed of sound is 340 m/s.
 
  A)
 
  170 Hz
 
  B)
 
  64 Hz
 
  C)
 
  85 Hz
 
  D)
 
  21 Hz
 
  E)
 
  57 Hz

Question 2

If the internal temperature of the sun is 15 x 106 K, what is the average kinetic energy of protons in this environment?
 
  A)
 
  0.040 eV
  B)
 
  1.3 keV
  C)
 
  1.9 keV
  D)
 
  1.3 MeV
  E)
 
  1.9 MeV

[jaaaaaaa]

Answer to Question 1

B

Answer to Question 2

C

[kamilo84]

Excellent

[AngeliqueG]

Thanks for the timely response, appreciate it